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.com
 */
/**
 * 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