Java 实例 反转String中的单词

该程序反转字符串的每个单词并将反转的字符串显示为输出。例如，如果我们输入一个字符串"reverse the word of this string"，那么程序的输出将是："esrever eht drow fo siht gnirts"。

示例：使用方法反转String中的每个单词

在本程序中，我们首先使用split()方法将给定的字符串拆分为子字符串。子串存储在String数组words中。程序然后使用反向的for循环反转子串的每个单词。

public class Example
{
   public void reverseWordInMyString(String str)
   {
    /* The split() method of String class splits
     * a string in several strings based on the
     * delimiter passed as an argument to it
     */
    String[] words = str.split(" ");
    String reversedString = "";
    for (int i = 0; i < words.length; i++)
        {
           String word = words[i]; 
           String reverseWord = "";
           for (int j = word.length()-1; j >= 0; j--) 
       {
        /* The charAt() function returns the character
         * at the given position in a string
         */
        reverseWord = reverseWord + word.charAt(j);
       }
       reversedString = reversedString + reverseWord + " ";
    }
    System.out.println(str);
    System.out.println(reversedString);
   }
   public static void main(String[] args) 
   {
    Example obj = new Example();
    obj.reverseWordInMyString("Welcome to BeginnersBook");
    obj.reverseWordInMyString("This is an easy Java Program");
   }
}

输出：

Welcome to BeginnersBook
emocleW ot kooBsrennigeB 
This is an easy Java Program
sihT si na ysae avaJ margorP