String input validation java

Validating string input java

boolean quit = false;
do{ // change your while by this

    // your own stuff here


    // then after all your program stuff
    boolean choiceIsOK = false;
    do{
    String userinput = sc.next();
    char choice = userinput.toLowerCase().charAt(0);
    switch(choice){
    case 'y':
        // case y, do nothing, you could even remove that case.
        choiceIsOK = true;
        break;
    case 'n':
        // case n, do something here
        choiceIsOK = false;
        quit = true;
        break;
    default:
        // error or warning
        System.out.println("Type Y or N to respectively continue or quit");
        break;
    }
    }while(!choiceIsOK);
}while (!quit);

Source: stackoverflow.com

Similar codes

0 vote190 views1 answer
Android pick up photo from local device
Java
2 votes162 views1 answer
Java cmd install raspbian
Java
7 votes168 views3 answers
Convert Integer arraylist to array java
Java
0 vote179 views1 answer
Hgjhghj
Java
0 vote128 views1 answer
Android studio java catch empty Button
Java
3 votes169 views2 answers
Random text generator in java
Java
3 votes182 views1 answer
Java how to output to a executable
Java
0 vote168 views1 answer
How to create a node in Java
Java
0 vote169 views1 answer
Moving text in textview android
Java
0 vote166 views1 answer
LocalRegistry java rebind() java8
Java