JAVA学习笔记一（JAVA输出环境变量）

package mytest;
import java.util.*;;

public class mymain {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		System.out.print(new Date());
		Properties p=System.getProperties();
		p.list(System.out);

		Runtime rt=Runtime.getRuntime();
		System.out.println("Total Memory="+rt.totalMemory()+"Free Memory="+rt.freeMemory());
	}

}

输出内容为：

Sun May 04 12:49:37 CST 2014-- listing properties --

java.runtime.name=Java(TM) SE Runtime Environment

sun.boot.library.path=C:\Program Files\Java\jre6\bin

java.vm.version=20.12-b01

java.vm.vendor=Sun Microsystems Inc.

java.vendor.url=http://java.sun.com/

path.separator=;

java.vm.name=Java HotSpot(TM) Client VM

file.encoding.pkg=sun.io

user.country=CN

sun.java.launcher=SUN_STANDARD

sun.os.patch.level=

java.vm.specification.name=Java Virtual Machine Specification

user.dir=C:\Users\dqq\workspace\mytest

java.runtime.version=1.6.0_37-b06

java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment

java.endorsed.dirs=C:\Program Files\Java\jre6\lib\endorsed

os.arch=x86

java.io.tmpdir=C:\Users\dqq\AppData\Local\Temp\

line.separator=

java.vm.specification.vendor=Sun Microsystems Inc.

user.variant=

os.name=Windows 7

sun.jnu.encoding=GBK

java.library.path=C:\Program Files\Java\jre6\bin;C:\Win...

java.specification.name=Java Platform API Specification

java.class.version=50.0

sun.management.compiler=HotSpot Client Compiler

os.version=6.1

user.home=C:\Users\dqq

user.timezone=Asia/Shanghai

java.awt.printerjob=sun.awt.windows.WPrinterJob

file.encoding=GBK

java.specification.version=1.6

user.name=dqq

java.class.path=C:\Users\dqq\workspace\mytest\bin

java.vm.specification.version=1.0

sun.arch.data.model=32

java.home=C:\Program Files\Java\jre6

sun.java.command=mytest.mymain

java.specification.vendor=Sun Microsystems Inc.

user.language=zh

awt.toolkit=sun.awt.windows.WToolkit

java.vm.info=mixed mode, sharing

java.version=1.6.0_37

java.ext.dirs=C:\Program Files\Java\jre6\lib\ext;C:...

sun.boot.class.path=C:\Program Files\Java\jre6\lib\resour...

java.vendor=Sun Microsystems Inc.

file.separator=\

java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport...

sun.cpu.endian=little

sun.io.unicode.encoding=UnicodeLittle

sun.desktop=windows

sun.cpu.isalist=pentium_pro+mmx pentium_pro pentium+m...

Total Memory=16252928Free Memory=15784080

这个是用来输出系统的一些配置。

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