我做我的if语句错误的Java还是有什么我需要添加来解析我的是，因为它返回为false[重复]

Question

package org.example.ChallengeGame;

import java.util.Random;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {

        //TODO Opening message for user
        System.out.println("Welcome to the guessing game!\n" +
                "We will provide a random number and you will guess what the number is.\n" +
                "Ready to begin? Press \"Yes\" if not type \"No\" \n");


        // TODO Initialize random integer
        Random random = new Random();
        int rand_int = random.nextInt(10) + 1;

        // TODO Get user input
        Scanner scanner = new Scanner(System.in);
        String user_ans = scanner.next();

        System.out.println("User answer is: " + user_ans);
        
        // This part is me checking if I type in "Yes" in my program will it work but it returns as false still
        if(user_ans == "Yes") {
            System.out.println("true");
        }else{
            System.out.println("false");
        }

        // This is my end goal so I can continue finishing my exercise
        /*if(user_ans == "Yes") {
            do {
                System.out.println("Start Game");
            } while (user_ans == "Yes");
        }else{
            System.out.println("Exit program");
        }*/
    }
}

Answer 1

首先，我建议你使用扫描仪。nextLine（），它将显示您键入的所有内容，直到您按enter键。此外，您正在尝试使用==运算符比较字符串，这是不应该做的-请改用user_ans.Equals（“Yes”）。在Java中，字符串存储为对象，因此使用=将对象的引用与字符串进行比较（在本例中为“是”）。使用。等于（“是”），则确保比较字符串变量的实际内容。