java在运行的时候并不会一下子把所有程序用到的class全部加载进来，而是通过ClassLoad来实现动态加载机制。
是对程序运行效率的一种优化，我这里贴出一个helloworld输出程序的实测输出数据，共400多行，有点长。。。
[Opened C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Object from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.Serializable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Comparable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.CharSequence from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.String from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.AnnotatedElement from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.GenericDeclaration from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Type from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Class from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Cloneable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassLoader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.System from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Throwable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Error from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ThreadDeath from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Exception from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.RuntimeException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.SecurityManager from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.ProtectionDomain from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.AccessControlContext from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.SecureClassLoader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ReflectiveOperationException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassNotFoundException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.LinkageError from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.NoClassDefFoundError from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassCastException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ArrayStoreException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.VirtualMachineError from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.OutOfMemoryError from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.StackOverflowError from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.IllegalMonitorStateException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.Reference from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.SoftReference from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.WeakReference from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.FinalReference from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.PhantomReference from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Cleaner from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.Finalizer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Runnable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Thread from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Thread$UncaughtExceptionHandler from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ThreadGroup from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Map from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Dictionary from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Hashtable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Properties from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.AccessibleObject from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Member from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Field from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Parameter from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Executable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Method from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Constructor from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.MagicAccessorImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.MethodAccessor from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.MethodAccessorImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.ConstructorAccessor from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.ConstructorAccessorImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.DelegatingClassLoader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.ConstantPool from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.FieldAccessor from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.FieldAccessorImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.UnsafeFieldAccessorImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.UnsafeStaticFieldAccessorImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.annotation.Annotation from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.CallerSensitive from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandle from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.DirectMethodHandle from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MemberName from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandleNatives from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.LambdaForm from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodType from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.BootstrapMethodError from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.CallSite from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.ConstantCallSite from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MutableCallSite from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.VolatileCallSite from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Appendable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.AbstractStringBuilder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.StringBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.StringBuilder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Unsafe from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.AutoCloseable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.Closeable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.InputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.ByteArrayInputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.File from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.net.URLClassLoader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.net.URL from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.jar.Manifest from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Launcher from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Launcher$AppClassLoader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Launcher$ExtClassLoader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.CodeSource from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.StackTraceElement from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.Buffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Boolean from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Character from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Number from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Float from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Double from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Byte from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Short from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Integer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Long from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.NullPointerException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ArithmeticException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.ObjectStreamField from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Comparator from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.String$CaseInsensitiveComparator from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.Guard from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.Permission from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.BasicPermission from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.RuntimePermission from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.AccessController from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.ReflectPermission from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.PrivilegedAction from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.ReflectionFactory$GetReflectionFactoryAction from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.cert.Certificate from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Iterable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.List from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.RandomAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.AbstractCollection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.AbstractList from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Vector from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Stack from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.ReflectionFactory from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.Reference$Lock from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.Reference$ReferenceHandler from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.ReferenceQueue from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.ReferenceQueue$Null from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.ReferenceQueue$Lock from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ref.Finalizer$FinalizerThread from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.VM from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Map$Entry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Hashtable$Entry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Math from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.Charset from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.spi.CharsetProvider from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.FastCharsetProvider from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.StandardCharsets from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.AbstractMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.util.PreHashedMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.StandardCharsets$Aliases from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.StandardCharsets$Classes from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.StandardCharsets$Cache from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ThreadLocal from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.atomic.AtomicInteger from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.IncompatibleClassChangeError from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.NoSuchMethodError from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.ArrayList from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Set from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.AbstractSet from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$EmptySet from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$EmptyList from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$EmptyMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$UnmodifiableCollection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$UnmodifiableList from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$UnmodifiableRandomAccessList from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.Reflection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.HashMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.HashMap$Node from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Class$3 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Class$ReflectionData from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Class$Atomic from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.generics.repository.AbstractRepository from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.generics.repository.GenericDeclRepository from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.generics.repository.ClassRepository from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Class$AnnotationData from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.annotation.AnnotationType from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.WeakHashMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassValue$ClassValueMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Modifier from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.LangReflectAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.ReflectAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Arrays from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.Charset$ExtendedProviderHolder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.Charset$ExtendedProviderHolder$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Opened C:\Program Files\Java\jre1.8.0_40\lib\charsets.jar] [Loaded sun.nio.cs.AbstractCharsetProvider from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ext.ExtendedCharsets from C:\Program Files\Java\jre1.8.0_40\lib\charsets.jar] [Loaded java.lang.Class$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.ReflectionFactory$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.NativeConstructorAccessorImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.DelegatingConstructorAccessorImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.SortedMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.NavigableMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.TreeMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.ASCIICaseInsensitiveComparator from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.TreeMap$Entry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.HistoricallyNamedCharset from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ext.GBK from C:\Program Files\Java\jre1.8.0_40\lib\charsets.jar] [Loaded java.lang.StringCoding from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ThreadLocal$ThreadLocalMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ThreadLocal$ThreadLocalMap$Entry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.StringCoding$StringDecoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ext.DoubleByte from C:\Program Files\Java\jre1.8.0_40\lib\charsets.jar] [Loaded sun.nio.cs.ext.DelegatableDecoder from C:\Program Files\Java\jre1.8.0_40\lib\charsets.jar] [Loaded sun.nio.cs.ArrayDecoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.CharsetDecoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ext.DoubleByte$Decoder from C:\Program Files\Java\jre1.8.0_40\lib\charsets.jar] [Loaded java.nio.charset.CodingErrorAction from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Hashtable$EntrySet from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$SynchronizedCollection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$SynchronizedSet from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Objects from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Enumeration from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Iterator from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Hashtable$Enumerator from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Runtime from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Version from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FileInputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FileDescriptor from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.JavaIOFileDescriptorAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FileDescriptor$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.SharedSecrets from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.Flushable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.OutputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FileOutputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FilterInputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.BufferedInputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.atomic.AtomicReferenceFieldUpdater from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.PrivilegedExceptionAction from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.reflect.misc.ReflectUtil from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FilterOutputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.PrintStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.BufferedOutputStream from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.Writer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.OutputStreamWriter from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.StreamEncoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.security.action.GetPropertyAction from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ArrayEncoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.CharsetEncoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ext.DoubleByte$Encoder from C:\Program Files\Java\jre1.8.0_40\lib\charsets.jar] [Loaded java.nio.ByteBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.HeapByteBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.Bits from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.ByteOrder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.JavaNioAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.Bits$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Readable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.CharBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.HeapCharBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.CoderResult from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.CoderResult$Cache from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.CoderResult$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.charset.CoderResult$2 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.BufferedWriter from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.DefaultFileSystem from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FileSystem from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.WinNTFileSystem from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.ExpiringCache from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.LinkedHashMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.ExpiringCache$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Enum from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.File$PathStatus from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.file.Watchable from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.file.Path from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassLoader$NativeLibrary from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.StringCoding$StringEncoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassLoader$3 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.ExpiringCache$Entry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.LinkedHashMap$Entry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Terminator from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.SignalHandler from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Terminator$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Signal from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.NativeSignalHandler from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Integer$IntegerCache from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.OSEnvironment from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.io.Win32ErrorMode from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.JavaLangAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.System$2 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.IllegalArgumentException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Compiler from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Compiler$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.net.URLStreamHandlerFactory from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Launcher$Factory from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.security.util.Debug from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassLoader$ParallelLoaders from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.WeakHashMap$Entry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Collections$SetFromMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.WeakHashMap$KeySet from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.JavaNetAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.net.URLClassLoader$7 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.StringTokenizer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Launcher$ExtClassLoader$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.MetaIndex from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.Reader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.BufferedReader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.InputStreamReader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FileReader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.StreamDecoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.reflect.Array from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Locale from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.util.locale.LocaleObjectCache from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Locale$Cache from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentHashMap from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.locks.Lock from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.locks.ReentrantLock from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentHashMap$Segment from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentHashMap$Node from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentHashMap$CounterCell from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentHashMap$CollectionView from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentHashMap$KeySetView from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentHashMap$ValuesView from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.concurrent.ConcurrentHashMap$EntrySetView from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.util.locale.BaseLocale from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.util.locale.BaseLocale$Cache from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.util.locale.BaseLocale$Key from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.util.locale.LocaleObjectCache$CacheEntry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.Locale$LocaleKey from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.util.locale.LocaleUtils from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.CharacterData from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.CharacterDataLatin1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.HashMap$TreeNode from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FileInputStream$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.net.www.ParseUtil from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.BitSet from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.net.Parts from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.net.URLStreamHandler from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.net.www.protocol.file.Handler from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.JavaSecurityAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.ProtectionDomain$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.JavaSecurityProtectionDomainAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.ProtectionDomain$3 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.ProtectionDomain$Key from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.Principal from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.HashSet from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.URLClassPath from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.net.www.protocol.jar.Handler from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Launcher$AppClassLoader$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.SystemClassLoaderAction from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandleImpl from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandleImpl$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.function.Function from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandleImpl$2 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandleImpl$3 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassValue from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandleImpl$4 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassValue$Entry from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassValue$Identity from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.ClassValue$Version from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MemberName$Factory from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandleStatics from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.invoke.MethodHandleStatics$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.PostVMInitHook from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.launcher.LauncherHelper from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.net.URLClassLoader$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.net.util.URLUtil from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.URLClassPath$3 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.URLClassPath$Loader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.URLClassPath$JarLoader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.zip.ZipConstants from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.zip.ZipFile from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.JavaUtilZipFileAccess from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.zip.ZipFile$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ThreadLocalCoders from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ThreadLocalCoders$Cache from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ThreadLocalCoders$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.ThreadLocalCoders$2 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.Unicode from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.UTF_8 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.cs.UTF_8$Decoder from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.URLClassPath$FileLoader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Resource from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.URLClassPath$FileLoader$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Package from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.ByteBuffered from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.PerfCounter from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Perf$GetPerfAction from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.Perf from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.misc.PerfCounter$CoreCounters from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.nio.ch.DirectBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.MappedByteBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.DirectByteBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.LongBuffer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.nio.DirectLongBufferU from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.PermissionCollection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.Permissions from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.net.URLConnection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.net.www.URLConnection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.net.www.protocol.file.FileURLConnection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded sun.net.www.MessageHeader from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FilePermission from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FilePermission$1 from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.FilePermissionCollection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.AllPermission from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.UnresolvedPermission from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.security.BasicPermissionCollection from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded com.sdnu.jimbo.learn.MyMainFunction from file:/F:/MyEclipseWorkSpace/LearnJava/bin/] [Loaded sun.launcher.LauncherHelper$FXHelper from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Class$MethodArray from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.LayoutManager from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.util.EventListener from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.event.ActionListener from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.image.ImageObserver from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.MenuContainer from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.Component from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded javax.accessibility.Accessible from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.Button from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.event.WindowListener from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.TextComponent from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.awt.TextField from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded com.sdnu.jimbo.learn.extend.Animal from file:/F:/MyEclipseWorkSpace/LearnJava/bin/] [Loaded com.sdnu.jimbo.learn.extend.Dog from file:/F:/MyEclipseWorkSpace/LearnJava/bin/] [Loaded java.util.concurrent.ConcurrentHashMap$ForwardingNode from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.io.IOException from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Void from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] Hello world ! [Loaded java.lang.Shutdown from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar] [Loaded java.lang.Shutdown$Lock from C:\Program Files\Java\jre1.8.0_40\lib\rt.jar]
在第397行才加载出我的main函数所在的类，一开始是加载了object，然后又String，Exception等我们常用的一些类，当然那些load进来的都是JDK需要使用的。
那么我们怎么验证是否是一个一个加载的呢？
我们使用如下代码：
package com.sdnu.jimbo.learn;
public class MyMainFunction {
public static void main(String [] agrs){
new A();
System.out.println("Hello world !");
new B();
}
}
class A{
}
class B{
}
输出结果如下：我只是截取了有用的地方
[Loaded com.sdnu.jimbo.learn.A from file:/F:/MyEclipseWorkSpace/LearnJava/bin/] Hello world ! [Loaded com.sdnu.jimbo.learn.B from file:/F:/MyEclipseWorkSpace/LearnJava/bin/]
这样就一目了然了。
其实在java运行过程中有好多个ClassLoad 包括
bootstrap class loader：最先启动的classload 最核心的class都是被他load的 一般由c 汇编编写
这个类一般是没有名字的 打印不出来 一般出null值
其他的classload都是java写的，所以说其他的classload都是先要被bootstrap给load进来
extesion class loader： 加载java扩展类库的class
application class loader：加载我们自己写的类
除了这些，还有SecureClassLoader，URLClassLoader等等这些个class loader
可以通过下面这个方法来验证以上的方法，BootstrapClassLoad会出null值
System.out.println(String.class.getClassLoader().getClass().getName());
这几个classload在内存中的层次关系是这样的
ClassLoader classLoader = MyMainFunction.class.getClassLoader();
while(classLoader != null){
System.out.println(classLoader.getClass().getName());
classLoader = classLoader.getParent();
}
输出结果：
sun.misc.Launcher$AppClassLoader sun.misc.Launcher$ExtClassLoader
那么为什么要这样设计呢？
是这样的，在classload工作的时候，他首先检查一下他的parentclassload是否加载了这个class，如果没有他就来加载，否则就是不加载了，只需要加载一次就可以了。
这样做的更深层次的作用是限制权限
时间： 2024-11-09 02:38:41