joptionpane showmessagedialog

1JOptionPane.showMessageDialog(null, "A basic JOptionPane message dialog");

1import javax.swing.JOptionPane;
2
3public class Main {
4  public static void main(String[] argv) throws Exception {
5
6    JOptionPane.showMessageDialog(null, "I am happy.");
7
8  }
9}
10

1alert('Message');

1import javax.swing.ImageIcon;
2import javax.swing.JFrame;
3import javax.swing.JOptionPane;
4
5public class ShowMessageDialogExample1
6{
7  public static void main(String[] args)
8  {
9    String backupDir = "/Users/al/backups";
10    
11    // create a jframe
12    JFrame frame = new JFrame("JOptionPane showMessageDialog example");
13    
14    // show a joptionpane dialog using showMessageDialog
15    JOptionPane.showMessageDialog(frame,
16        "Problem writing to backup directory: '" + backupDir + "'.");
17    System.exit(0);
18  }
19}
20

1JOptionPane.showMessageDialog(null, "java is fun");

1JOptionPane.showMessageDialog(frame, "A basic JOptionPane message dialog");
2