Popup Menu in Java

It is very interesting java program using java awt. Here is the program code to create popup menu when your press right mouse button.

import javax.swing.*;

import java.awt.event.*;

public class PopUpMenu{

JPopupMenu Pmenu;
JMenuItem menuItem;

public static void main(String[] args) {

PopUpMenu p = new PopUpMenu();


}



public PopUpMenu(){

JFrame frame = new JFrame("Popup Menu Example");


frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Pmenu = new JPopupMenu();

menuItem = new JMenuItem("New");

Pmenu.add(menuItem);

menuItem = new JMenuItem("Open");

Pmenu.add(menuItem);

menuItem = new JMenuItem("Save");

Pmenu.add(menuItem);

menuItem = new JMenuItem("Cut");

Pmenu.add(menuItem);

menuItem = new JMenuItem("Paste");

Pmenu.add(menuItem);

menuItem.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){}

});


frame.addMouseListener(new MouseAdapter(){

public void mouseReleased(MouseEvent Me){

if(Me.isPopupTrigger()){


Pmenu.show(Me.getComponent(), Me.getX(), Me.getY());

}

}

});


frame.setSize(400,400);

frame.setVisible(true);

}

Prime Number Program : Java Programming

This program explain you how to check the number is prime or not if user input the value from keyboard. Here is the source code :

import java.io.*;



class PrimeNumber {

public static void main(String[] args) throws Exception{


int i;

BufferedReader bf = new BufferedReader(

new InputStreamReader(System.in));


System.out.println("Enter number to Check:");

int num = Integer.parseInt(bf.readLine());

System.out.println("Prime number: ");


for (i=1; i < num; i++ ){

int j;

for (j=2; j<i; j++){


int n = i%j;

if (n==0){

break;

}

}


if(i == j){

System.out.print(" "+i);

}

}


}

}