Input.java

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * User: Florian Reisinger
 */
public class Input {
    private static Scanner console = new Scanner(System.in);
    private static Boolean lastWorking = true;

    public static String getString() {
        return console.nextLine();
    }

    public static int getInt() {
        int i = 0;
        do {
            try {
                i = Integer.parseInt(getString());
                lastWorking = true;
            } catch (Exception e) {
                System.out.println("No valid int!");
                System.out.print("Retry: ");
                lastWorking = false;
            }
        } while (!lastWorking);
        return i;

    }

    public static float getFloat() {
        float i = 0;
        do {
            try {
                i = Float.parseFloat(getString());
                lastWorking = true;
            } catch (Exception e) {
                System.out.println("No valid float! Please use \".\" instead of \",\"");
                System.out.print("Retry: ");
                lastWorking = false;
            }
        } while (!lastWorking);
        return i;

    }

    public static double getDouble() {
        double i = 0;
        do {
            try {
                i = Double.parseDouble(getString());
                lastWorking = true;
            } catch (Exception e) {
                System.out.println("No valid double! Please use \".\" instead of \",\"");
                System.out.print("Retry: ");
                lastWorking = false;
            }
        } while (!lastWorking);
        return i;

    }

    public static long getLong() {
        long i = 0;
        do {
            try {
                i = Long.getLong(getString());
                lastWorking = true;
            } catch (Exception e) {
                System.out.println("No valid long");
                System.out.print("Retry: ");
                lastWorking = false;
            }
        } while (!lastWorking);
        return i;

    }

    public static byte getByte() {
        byte i = 0;
        do {
            try {
                i = Byte.decode(getString());
                lastWorking = true;
            } catch (Exception e) {
                System.out.println("No valid byte.");
                System.out.print("Retry: ");
                lastWorking = false;
            }
        } while (!lastWorking);
        return i;

    }

    private static String[] getWordHelper(String source) {
        return source.split(" ");
    }

    public static String[] getWords() {
        return getWordHelper(getString());
    }

    public static String getFirstWord() {
        return getWordHelper(getString())[0];
    }
}