Java 初学者程序帮助(if、else 问题)

Question

我正在练习制作自己的字符串反转工具。为了完成学习过程，我在一个简单的应用程序中使用了该方法。但是..
当我在 Eclipse 中运行代码时，即使这个词=赛车颠倒过来就变成=racecar(单词颠倒过来)。显示其他..告诉我单词和反向永远不会相等......但是......在这种情况下它们是吗？正确的？请给我一些建议，这真是太糟糕了。谢谢。

import java.util.Scanner;

public class Main {

    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args){

    System.out.println("Please enter a word, I'll show it reversed ");
    System.out.println("and tell you if it is read the same forward and backward(A Palindrome)!: ");
        String word = sc.nextLine();
        String reverse = reverse(word);

        if (reverse == word){
            System.out.println("Your word: " + word + " backwards is " + reverse + ".");
            System.out.println("Your word is read the same forward and backward!");
            System.out.println("Its a Palindrome!");
        }

        else {
            System.out.println("Your word: " + word + " backwards is " + reverse + ".");
            System.out.println("Your word is not read the same forward and backward!");
            System.out.println("Its not a Palindrome!");
        }



    }

    public static String reverse(String source){

        if (source == null || source.isEmpty()){
            return source;
        }

        String reverse = "";

        for(int i = source.length() -1; i >= 0; i--){
            reverse = reverse + source.charAt(i);
        }

        return reverse;
    }

}

Answer 1

始终使用String#equals比较字符串。 == 将比较引用是否相等，但由于它们的存储方式，这对于比较相等的字符串实际上不起作用。

if (reverse.equals(word))