Java StringBuffer deleteCharAt()用法及代码示例

Java.lang.StringBuffer.deleteCharAt()是内置 Java方法，该方法删除此序列中指定位置的char。这样该序列减少了1个字符。

用法:

public StringBuffer deleteCharAt(int indexpoint)

参数：该方法接受整数类型的单个参数索引点，该索引点指向要删除的char的索引。
返回值：该函数返回字符串或删除字符后返回此对象。
异常：如果索引点为负或大于或等于length()，则该方法将引发StringIndexOutOfBoundsException。

例子：

Input : StringBuffer = worldofgeeks
        int indexpoint = 4
Output : worlofgeeks

下面的程序说明StringBuffer.deleteCharAt()方法的用法：
示例1:

// Java program to demonstrate working 
// of StringBuffer.deleteCharAt() method 
  
import java.lang.*; 
  
public class Geeks { 
  
    public static void main(String[] args) 
    { 
  
        StringBuffer sbf = new StringBuffer("raghav"); 
        System.out.println("String buffer before deletion = " + sbf); 
  
        // Deleting the character at indexpoint 5 
        sbf.deleteCharAt(5); 
        System.out.println("After deletion new StringBuffer = " + sbf); 
    } 
}

输出：

String buffer before deletion = raghav
After deletion new StringBuffer = ragha

示例2:

// Java program to demonstrate working 
// of StringBuffer.deleteCharAt() method 
  
import java.lang.*; 
  
public class Geeks { 
  
    public static void main(String[] args) 
    { 
  
        StringBuffer sbf = new StringBuffer("GeeksforGeeks"); 
        System.out.println("String buffer before deletion = " + sbf); 
  
        // Deleting the character at indexpoint 5 
        sbf.deleteCharAt(5); 
        System.out.println("After deletion new StringBuffer = " + sbf); 
    } 
}

输出：

String buffer before deletion = GeeksforGeeks
After deletion new StringBuffer = GeeksorGeeks

示例3:

// Java program to demonstrate working 
// of StringBuffer.deleteCharAt() method 
  
import java.lang.*; 
  
public class Geeks { 
  
    public static void main(String[] args) 
    { 
  
        StringBuffer sbf = new StringBuffer("Abhishek"); 
        System.out.println("String buffer before deletion = " + sbf); 
  
        // Deleting the character at indexpoint -5 
        sbf.deleteCharAt(-5); 
        System.out.println("After deletion new StringBuffer = " + sbf); 
    } 
}

输出：

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: 
                                             String index out of range: -5
    at java.lang.AbstractStringBuilder.deleteCharAt
                                          (AbstractStringBuilder.java:824)
    at java.lang.StringBuffer.deleteCharAt(StringBuffer.java:441)
    at Geeks.main(Geeks.java:14)

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注：本文由纯净天空筛选整理自ankita_chowrasia大神的英文原创作品 StringBuffer deleteCharAt() Method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。