How can I repeatedly read user input using Scanner java

Question

I am trying to create a simple menu for my program that reads user input. Here\'s the code:

public void menu() {
        String command;

        System.out.prin         


        

Answer 1

You can use

InputStreamReader str= new InputStreamReader (System.in);
BufferedReader uinp= new BufferedReader (str);
String val;
val= uinp.readLine();
while (!".".equals(val)) {
//do your stuff
//..and after done, read the next line of the user input.
val= uinp.readLine();
}

Answer 2

Why not do something like this:

public class test {

private static Scanner scanner;

public static void main(String args[]) {
    scanner = new Scanner(System.in);
    printmenu();      
    getinput();
}

private static void printmenu(){
    System.out.println("To operate with words write: a");
    System.out.println("To operate with products write: b");
}

private static void getinput(){
    System.out.print("\nGive the command: ");
    String command = "";
    while (!scanner.hasNext()) {

    }
    command = scanner.next();

    if (command.equals("a")) {
        System.out.println("\nGood job! You have chosen the word program\n");
        System.out.println("You can only use the following commands: ");
        System.out.println("exit - to exit the program");
        System.out.println("add - to add a word into the map");
        System.out.println("lookup - to lookup a word into the map\n");
        System.out.print("Give a command: ");

        while(scanner.hasNext()){
            command = scanner.next();
            if(command.contains("add")){

                addWord();
            }
            else{
                System.out.println(command);
            }
            getinput();
        }
    }
    else{
        scanner.close();
    }
}

public static void addWord() {

    System.out.print("Give the word: ");
    String word = scanner.next();
    System.out.print("Give the word's plural: ");
    String plural = scanner.next();
    //controller.addTheWord(word, plural);
}

}

Answer 3

You should use switch case inside the while loop instead of if. The switch case should provide the functionality depending on the input provided by the user.