Java输入问题-如何比较字符串 [英] Java Input Problems - how to compare strings

问题描述

这似乎很简单，但是我已经在这里停留了几个小时.

This seems to be pretty simple, but I have been stucked here for a couple of hours.

当您必须比较Java中的两个字符串时，我感到怀疑.

I have a doubt when you have to compare two Strings in Java.

如果我只是这样做:

String var1 = "hello";
String var2 = "hello";

然后在另一个函数中比较这两个单词，结果显然是正确的.

and then compare these two words in another function, the result will clearly be true.

但是问题是当我必须比较来自输入的两个单词时.这是我的代码:

But the problem is when I have to compare two words that come from an input. Here is my code:

import java.util.Scanner;

public class Compare{

public static void main(String[] args){
    Scanner Scanner = new Scanner (System.in);

    System.out.println("Enter first word: ");
    String var1 = Scanner.nextLine();

    System.out.println("Enter second word: ");
    String var2 = Scanner.nextLine();

    if (same (var1, var2))
        System.out.println("Yes");
    else
        System.out.println("No");
}

public static boolean same (String var1, String var2){
    if (var1 == var2)
        return true;        
    else
        return false;
}


}

我尝试了几次(显然输入了相同的单词)，结果始终是False.

I have tried several times (clearly entering the same word) and the result is always False.

我不知道为什么会这样.我想念什么?

I don't know why this happens. What am I missing?

这是我第一次使用Java.我将不胜感激.谢谢

This is my first time in Java. I will appreciate any kind of help. Thanks

推荐答案

您应该更改

if (var1 == var2)
{
    return true;        
}
else
{
    return false;
}

到

if (var1.equals(var2))
{
    return true;        
}
else
{
    return false;
}

有关两者之间的区别，请参见此答案.

See this answer for the difference between the two

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