java deletecharat_Java StringBuilder deleteCharAt()方法

Java StringBuilder deleteCharAt()方法

java.lang.StringBuilder.deleteCharAt() 方法移除在此序列中的指定位置的char值。此序列是由一个字符缩短。

1 语法

public StringBuilder deleteCharAt(int index)

2 参数

index ： 要删除字符的索引。

3 返回值

这个方法返回这个对象。

4 示例

package com.yiidian;

/**

* 一点教程网： http://www.yiidian

*/

/**

* Java StringBuilder deleteCharAt()方法

*/

import java.lang.*;

public class StringBuilderDemo {

public static void main(String[] args) {

StringBuilder str = new StringBuilder("Java lang package");

System.out.println("string = " + str);

// deleting character from index 4 to index 9

str.delete(4, 9);

System.out.println("After deletion = " + str);

str = new StringBuilder("amit");

System.out.println("string = " + str);

// deleting character at index 2

str.deleteCharAt(2);

System.out.println("After deletion = " + str);

}

}

输出结果为：

string = Java lang package

After deletion = Java package

string = amit

After deletion = amt