java-字符串反转
package com.day7.one;
import java.util.Scanner;
public class Test2 {
/**
* 字符串反转:"abcd"到"dcba"
*/
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
String s1=sc.nextLine();//将键盘的录入的字符串存储在s1中
char[] s2=s1.toCharArray();
for (int i = 0; i < (s2.length)/2; i++)
{
char c;
c=s2[i];
s2[i]=s2[s2.length-1-i];
s2[s2.length-1-i]=c;
}
//方法1
for (int i = 0; i < s2.length; i++)
{
System.out.print(s2[i]);
}
//方法2,推荐使用方法2
String s3=String.valueOf(s2);//将字符数组转成字符串
System.out.println(s3);
}
}