JavaSE8基础 StringBuffer toString 将其转为String对象

os :windows7 x64
    jdk:jdk-8u131-windows-x64
    ide:Eclipse Oxygen Release (4.7.0)
    
    
code:

package jizuiku0;

public class Demo10 {
	public static void main(String[] args) {
		StringBuffer sb = new StringBuffer();
		sb.append("cnblog_");
		sb.append("jizuiku");

		String str = sb.toString();
		System.out.println(str);
	}
}

result:

sourceCode:

    @Override
    public synchronized String toString() {
        if (toStringCache == null) {
            toStringCache = Arrays.copyOfRange(value, 0, count);
        }
        return new String(toStringCache, true);
    }


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时间: 2024-10-29 15:52:01

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