StringBuffer的常用方法
1 package com.atfu.java01; 2 3 import org.junit.Test; 4 5 /** 6 * 7 * 8 * @author fu jingchao 9 * @creat 2021/10/31-15:03 10 */ 11 public class StringBufferTest { 12 13 /* 14 StringBuffer的常用方法: 15 StringBuffer append(xxx):提供了很多的append()方法,用于字符串的拼接 16 StringBuffer delete(int start,int end):删除指定位置的内容(不包括end) 17 StringBuffer replace(int start,int end,String str):把[start,end)位置替换为str 18 StringBuffer insert(int offset,xxx):在指定位置插入xxx 19 StringBuffer reverse():把当前字符序列逆转 20 21 public int indexOf(String str) 22 public String substring(int start,int end) 23 public int length() 24 public char charAT(int n) 25 public void setCharAT(int n,char ch) 26 */ 27 28 @Test 29 public void test(){ 30 StringBuffer s1 = new StringBuffer("abc"); 31 s1.append(1); 32 s1.append('1'); 33 System.out.println(s1); 34 // s1.delete(1,3); 35 // System.out.println(s1);//"a11" 36 // s1.replace(0,3,"222"); 37 // s1.insert(1,"pq"); 38 s1.reverse(); 39 System.out.println(s1); 40 41 } 42 }
此为本人学习笔记,若有错误,请不吝赐教