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;
        }
}
}