String的常用操作

1、String可以和char数组、byte数组互换

//字符串转换为字符数组或者字节数组String s = "abc";char[] charArr = s.toCharArray();byte[] byteArr = s.getBytes();//字符数组或者字节数组转换成字符串String s1 = new String(charArr);String s3 = String.valueOf(charArr);String s2 = new String(byteArr);

2、字符串倒序

String s = "abc";StringBuilder sb = new StringBuilder(s);sb = sb.reverse();System.out.println(sb);//将StringBuilder转换成StringString s4= sb.toString();String s5 = String.valueOf(sb);