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

2 votes255 views1 answer
Android translate string java
Java
22 votes245 views6 answers
Height of Binary tree
Java
0 vote233 views1 answer
Add stringarrays to string list java
Java
0 vote258 views1 answer
Stream filter with multiple conditions
Java
0 vote235 views1 answer
Matrix multiplication javascrpt
Java
0 vote249 views3 answers
Java char to charsequence
Java
3 votes246 views4 answers
Java empty array
Java
1 vote251 views1 answer
Hql return new object from query
Java
0 vote254 views1 answer
What does this means error: cannot find symbol StorageRef.child(mUser()).putFile(imageUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>()
Java
6 votes250 views1 answer
How to select a random element from an array in java
Java