how to display all ouput using pop up dialog boxes

[Jean Miles]

I'd like the output from this code to be show in a popup dialog box.

import javax.swing.JOptionPane;    
import java.lang.String;


public class displayAPoem1    
{

public static void main(String[] args){  
        
int month = 0;
int number;
month = number; 
JOptionPane.showMessageDialog(null, phrase);

		switch(month)   //start switch
		{
		case 1: case 3:  case 5: case 7: case 8: case 10: case 12:
			System.out.println("All the rest have thirty-one,");
			break;
			case 2:
			System.out.println("Thirty days hath September,");
			System.out.println("April, June and November.");
			System.out.println("All the rest have thirty-one,");
			System.out.println("with February's 28 to make it fun.");
			System.out.println("Leap year happening once in four,");
			System.out.println("Gives Feburary one day more. ");
			break;
			case 4: case 6:case 11:
			System.out.println("April, June and November.");
			break;
			case 9:
			System.out.println("Thirty days path September");
			break;
		}
}
}