java之string类中其他功能的转换
利用string类功能把 字符串反转
package com.ifenx8.study.test;
import java.util.Scanner;
public class Demo_1 {
/**
* @param args
*/
public static void main(String[] args) {
//demo1();
//demo2();
//案例:字符串反转的用法,键盘录入“abc”,输出结果“cba”;
Scanner sc = new Scanner(System.in);
System.out.println("请输入一个字符串:");
String s1 = sc.nextLine();
for(int i = s1.length()-1; i >= 0; i--){
char c = s1.charAt(i);
System.out.print(c);
}
}
public static void demo2() {
//string类去除字符串前后空格
String s1 = " nishi shui ";
String s2 = s1.trim();
System.out.println(s2);//去掉前后空格用trim方法
System.out.println(s1);//没有去掉空格
}
public static void demo1() {
//替换功能string类
String s1 = "abc";
String s2 = s1.replace('b', 'a');
String s3 = s1.replace("ab", "cc");
System.out.println(s2);
System.out.println(s3);
}
}