我怎样才能避免从循环外获取内容？

Question

If I write:

import java.util.Scanner;

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

        System.out.println("please select a weapon to kill this long range zombie: ");
        System.out.println(" ");
        System.out.println("Choose: ");
        System.out.printf("1:Knife  %n2:Shutgun %n3:Sniper" );
        
                
        while(true) {
        
        Scanner myWeapons = new Scanner(System.in);  // Create a Scanner object
        System.out.println(" ");
        

        int userChoice = myWeapons.nextInt();
        
      
            
        if( userChoice != 3 )  {
            System.out.println("you selected the wrong weapon,please select a long range weapon");
            
            
        } else {
            
            System.out.println("great you selected the sniper");
            
            break;
            
        }   
            System.out.println("let's play another game");
        }
    }
    
}

Each time I take a response I will also get "let's play another game" printed. For example:

https://i.stack.imgur.com/bEjkP.png

Answer 1

Since you want to wait for the user to enter a long range weapon then it means you need to loop infinitely until user input weapon is not 3. You were thinking in right direction but the code block placement wasn't right. Try this code which wait indefinitely until userChoice is not 3.

public static void main (String[] args) throws java.lang.Exception
{
    System.out.println("please select a weapon to kill this long range zombie: ");
    System.out.println(" ");
    System.out.println("Choose: ");
    System.out.printf("1:Knife  %n2:Shutgun %n3:Sniper" );
            
    Scanner myWeapons = new Scanner(System.in);  // Create a Scanner object
    System.out.println(" ");

    int userChoice = myWeapons.nextInt();
    while(userChoice != 3)  {
        System.out.println("you selected the wrong weapon,please select a long range weapon");
        userChoice = myWeapons.nextInt();
    }
    
    System.out.println("great you selected the sniper");
    
    System.out.println("let's play another game");
    
}