如何逐字反转Java Word中的字符串

在本节中, 我们逐字反转Java中的字符串。

示例1：使用递归逐个单词地反转字符串

import java.util.Scanner;
public class ReverseStringExample1 
{
public static void main(String[] args) 
{
String str;
System.out.println("Enter a string: ");
Scanner scanner = new Scanner(System.in);
str = scanner.nextLine();
scanner.close();							    //closes the input stream
String reversed = reverseString(str);
System.out.println("The reversed string is: " + reversed);
}
public static String reverseString(String s)
{
if (s.isEmpty())							//checks the string if empty
return s;
return reverseString(s.substring(1)) + s.charAt(0);                     //recursively called function
}
}

输出：

示例2：使用for循环逐字逆转字符串

import java.util.*;
public class ReverseStringDemo
{
public static void main(String[] arg)
{
ReverseStringDemo rs=new ReverseStringDemo();
Scanner sc=new Scanner(System.in);
System.out.print("Enter a string: ");
String  str=sc.nextLine();	
System.out.println("Reverse of a String  is : "+rs.reversestr(str)); 	      //called method
}
//reverse string method
static String reversestr(String s)
{
String r="";
for(int i=s.length();i>0;--i)		//execute until condition i>0 becomes false
{
r=r+(s.charAt(i-1)); 
}
return r;
}
}

输出：