JOptionPane pada Java

package sampleframe;

import javax.swing.*;
class JOptionPaneDemo {
    JOptionPane optionPane;
    void launchFrame(){
        optionPane = new JOptionPane();
        String name=optionPane.showInputDialog("Hi, what's your name?");
        optionPane.showMessageDialog (null, "Nice to meet you," + name + ".", "greeting...", optionPane.PLAIN_MESSAGE);
        System.exit (0);
    }
public static void main (String args[]){
    new JOptionPaneDemo().launchFrame();
}
}

output:

Semoga Bermanfaat ^^