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                # Java 中的反轉字符串 - 單詞反轉字符串 > 原文: [https://howtodoinjava.com/puzzles/how-to-reverse-string-in-java/](https://howtodoinjava.com/puzzles/how-to-reverse-string-in-java/) 學習編寫 **Java 程序以反轉字符串**。 我們將首先看到**如何反轉字符串**,我們還將看到**如何反轉字符串**。 在 [Java 面試](https://howtodoinjava.com/java-interview-questions/)中,這是初學者常見的題目。 讓我們記住這些解決方案以便快速調用。 ## 1\. 反轉字符串的 Java 程序 您可以使用`StringBuilder.reverse()`方法輕松地*逐字符反轉*字符串。 ```java String blogName = "HowToDoInJava.com"; String reverse = new StringBuilder(string).reverse(); System.out.println("Original String -> " + blogName); System.out.println("Reverse String -> " + reverse); Output: Original String -> HowToDoInJava.com Reverse String -> moc.avaJnIoDoTwoH ``` ## Java 程序通過單詞反轉字符串 當**通過單詞**反轉字符串內容時,最自然的方法是使用`StringTokenizer`和`Stack`。 如您所知,`Stack`是一個實現易于使用的后進先出(LIFO)對象棧的類。 ```java ] String description = "Java technology blog for smart java concepts and coding practices"; // reverse string builder StringBuilder reverseString = new StringBuilder(); // Put words from String in Stack Stack<String> myStack = new Stack<>(); StringTokenizer tokenizer = new StringTokenizer(description, " "); while (tokenizer.hasMoreTokens()) { myStack.push(tokenizer.nextToken()); } //Pop each word from stack and append in builder while (!myStack.empty()) { reverseString.append(myStack.pop() + " "); } System.out.println(reverseString.toString()); Output: practices coding and concepts java smart for blog technology Java ``` 學習愉快! 參考: [`StringBuilder.reverse()` Java 文檔](https://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html#reverse--) [`StringTokenizer`](https://docs.oracle.com/javase/8/docs/api/java/util/StringTokenizer.html)
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