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/**

* Description:

* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>

* <br/>Copyright (C), 2001-2016, Yeeku.H.Lee

* <br/>This program is protected by copyright laws.

* <br/>Program Name:

* <br/>Date:

* @author Yeeku.H.Lee kongyeeku@163.com

* @version 1.0

*/

public class StringBuilderTest

{

public static void main(String[] args)

{

StringBuilder sb = new StringBuilder();

// 追加字符串

sb.append("java");//sb = "java"

// 插入

sb.insert(0 , "hello "); // sb="hello java"

// 替换

sb.replace(5, 6, ","); // sb="hello, java"

// 删除

sb.delete(5, 6); // sb="hellojava"

System.out.println(sb);

// 反转

sb.reverse(); // sb="avajolleh"

System.out.println(sb);

System.out.println(sb.length()); // 输出9

System.out.println(sb.capacity()); // 输出16

// 改变StringBuilder的长度，将只保留前面部分

sb.setLength(5); // sb="avajo"

System.out.println(sb);

}

}