Java Community | Help. Code. Learn.•9mo ago

message variable holds the same value

I am trying to learn a bit of java before jumping into a project so when i do i'll know or have an idea on how to handle some situations. I am working on receiving user input. Which won't serve too big of a purpose later on but i still am gonna learn how. I'm currently having trouble getting my message variable to clear after a message has been printed to the console. It holds the same value after i enter any type of text. Anyone know why?

import java.util.Objects;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String message = scanner.nextLine();

        while (!Objects.equals(message, "QUIT")) {
            if (Objects.equals(message, "Hello")) {
                System.out.println("Hello there!");
                scanner.nextLine();
            }
            else if (Objects.equals(message, "Bye")) {
                System.out.println("Cya!");
                scanner.nextLine();
            }
        }
    }
}

import java.util.Objects;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String message = scanner.nextLine();

        while (!Objects.equals(message, "QUIT")) {
            if (Objects.equals(message, "Hello")) {
                System.out.println("Hello there!");
                scanner.nextLine();
            }
            else if (Objects.equals(message, "Bye")) {
                System.out.println("Cya!");
                scanner.nextLine();
            }
        }
    }
}

32 Replies

JavaBot•9mo ago

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Tomasm21•9mo ago

Because in the loop you don't assign a new string value to the message variable.

DevLop gamesOP•9mo ago

I need to reassign a value?

Tomasm21•9mo ago

yes

DevLop gamesOP•9mo ago

I just tried and i get the same issue Except the new value doesn't get recorded

Tomasm21•9mo ago

perhaps you are doing it wrong

DevLop gamesOP•9mo ago

How am i supposed to do it then??

Tomasm21•9mo ago

you have to assign it not in the condition

DevLop gamesOP•9mo ago

import java.util.Objects;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String message = scanner.nextLine();

        while (!Objects.equals(message, "QUIT")) {
            if (Objects.equals(message, "Hello")) {
                System.out.println("Hello there!");
                message = scanner.nextLine();
            }
            else if (Objects.equals(message, "Bye")) {
                System.out.println("Cya!");
                message = scanner.nextLine();
            }
        }
    }
}

import java.util.Objects;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String message = scanner.nextLine();

        while (!Objects.equals(message, "QUIT")) {
            if (Objects.equals(message, "Hello")) {
                System.out.println("Hello there!");
                message = scanner.nextLine();
            }
            else if (Objects.equals(message, "Bye")) {
                System.out.println("Cya!");
                message = scanner.nextLine();
            }
        }
    }
}

Where

Tomasm21•9mo ago

before condition

DevLop gamesOP•9mo ago

At the start of the loop?

Tomasm21•9mo ago

yes close the scanner after the loop.

DevLop gamesOP•9mo ago

Why do i need to do that?

Tomasm21•9mo ago

It's a bit better practice. To avoid memory leak for the scanner. when the application ends. If you are using Eclipse or IntelliJ then you might see that scanner is underlined in yellow

DevLop gamesOP•9mo ago

I don't see yellow

Tomasm21•9mo ago

too bad. Those IDEs can give you valuable information about the syntax

Tomasm21•9mo ago

DevLop gamesOP•9mo ago

You mean the tool tip?

Tomasm21•9mo ago

yea

DevLop gamesOP•9mo ago

I have that Also i'm noticing the application is ending with code 130 Why is this?

Tomasm21•9mo ago

I don't know. What editor are you using to wrote the code and to compile at running?

DevLop gamesOP•9mo ago

intellij community edition

Tomasm21•9mo ago

Try to close scanner and check whether you get the same ending code.

DevLop gamesOP•9mo ago

I am closing it

import java.util.Objects;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String message = "";

        while (!Objects.equals(message, "QUIT")) {
            message = scanner.nextLine();
            if (Objects.equals(message, "Hello")) {
                System.out.println("Hello there!");
            }
            else if (Objects.equals(message, "Bye")) {
                System.out.println("Cya!");
            }
        }
        scanner.close();
    }
}

import java.util.Objects;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String message = "";

        while (!Objects.equals(message, "QUIT")) {
            message = scanner.nextLine();
            if (Objects.equals(message, "Hello")) {
                System.out.println("Hello there!");
            }
            else if (Objects.equals(message, "Bye")) {
                System.out.println("Cya!");
            }
        }
        scanner.close();
    }
}

Tomasm21•9mo ago

ok I don't know regarding 130. But the initial question is solved.

DevLop gamesOP•9mo ago

Soo can i get an explanation on what code 130 is? I cannot find anything explaining what it is exactly and what can cause it.

Tomasm21•9mo ago

If your console outputs it, you can copy it and search with google. You can put a comma and write IntelliJ console output as well

DevLop gamesOP•9mo ago

Could you just tell me Just tell me i'm not seeing any useful information here

Tomasm21•9mo ago

If I will find it then ok paste here what do you see in your console

DevLop gamesOP•9mo ago

Process finished with exit code 130 This is the only relevant thing

Tomasm21•9mo ago

Have you pressed "Ctrl+C" to stop the program? If yes then that's the reason. otherwise if you type QUIT then it should end normally and exit code should be 0.

JavaBot•9mo ago

Post Closed

This post has been closed by <@769926604872613899>.

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message variable holds the same value

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