Reading input using Scanner causes an infinite loop in Java [duplicate]

Answer 1

You are better off writing the code like this:

while(true){
    try{
        int level = scan.nextInt();
        if(level==1){
            System.out.println("You selected level 1!");
            break;
        }else if(level==2){
            System.out.println("You selected level 2!");
            break;
        }else if(level==3){
            System.out.println("You selected level 3!");
            break;
        }else{
            System.out.println("That's not an option!");
            continue;
        }
    }catch(InputMismatchException input){
        System.out.println("That's not an option!");
        continue;
    }
}

continue will immediately resume execution of the loop at the top, and break will immediately jump too the closing brace } of the while. This removes the use of the i counter variable, which was entirely useless to the code. Also, this code will never run indefinitely, unless the user indefinitely enters improper values!

Hope this helped, good luck!