deleteCharAt()方法和delete（）实例

以下例子将告诉你如何使用 java.lang.StringBuffer.deleteCharAt() method.

package yiibai.com;

import java.lang.*;

public class StringBufferDemo {

  public static void main(String[] args) {
 
    StringBuffer buff = new StringBuffer("Java lang package");
    System.out.println("buffer = " + buff);

    // deleting character from index 4 to index 9
    buff.delete(4, 9);
    System.out.println("After deletion = " + buff);

    buff = new StringBuffer("amit");
    System.out.println("buffer = " + buff);
    // deleting character at index 2
    buff.deleteCharAt(2);
    System.out.println("After deletion = " + buff);
  }
}
编译和执行以上程序，将得到以下的结果：

buffer = Java lang package
After deletion = Java package
buffer = amit
After deletion = amt
转自http://www.yiibai.com/java/lang/stringbuffer_deletechara.html
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java 中charAt（）作用的
比如"abcde"
调用chatAt(0) 这个0就是该字符串中某一字符的索引
返回a
调用chatAt(1) 返回b