PrimeCheck.java Source code

Introduction

Here is the source code for PrimeCheck.java

Source

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.math.BigInteger;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingWorker;

public class PrimeCheck extends JFrame {
    public PrimeCheck() {
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        JPanel pnl = new JPanel();
        JButton btnCheck = new JButton("Check");
        ActionListener al;
        al = new ActionListener() {
            public void actionPerformed(ActionEvent ae) {
                try {
                    BigInteger bi = new BigInteger("1234567");
                    System.out.println("One moment...");
                    new PrimeCheckTask(bi).execute();
                } catch (NumberFormatException nfe) {
                    System.out.println("Invalid input");
                }
            }
        };
        btnCheck.addActionListener(al);
        pnl.add(btnCheck);
        getContentPane().add(pnl, BorderLayout.NORTH);
        pack();
        setResizable(false);
        setVisible(true);
    }

    public static void main(String[] args) {
        new PrimeCheck();
    }
}

class PrimeCheckTask extends SwingWorker<Boolean, Void> {
    private BigInteger bi;

    PrimeCheckTask(BigInteger bi) {
        this.bi = bi;
    }

    @Override
    public Boolean doInBackground() {
        return bi.isProbablePrime(1000);
    }

    @Override
    public void done() {
        try {
            boolean isPrime = get();
            if (isPrime)
                System.out.println("Integer is prime");
            else
                System.out.println("Integer is not prime");
        } catch (Exception ee) {
            System.out.println("Unable to determine primeness");
        }
    }
}