If the message is an array of objects (Object[ ]), make the JOptionPane place each entry onto a separate row.
If the message is a Component, place the component in the message area.
If the message is an Icon, place the Icon within a JLabel and display the label in the message area.
If the message is an Object, convert it to a String with toString(), place the String in a JLabel, and display the label in the message area.
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
public class Test2 extends JFrame {
public Test2() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
getContentPane().add(new JLabel("Placeholder label"));
pack();
setSize(200, 200);
setVisible(true);
Object msg[] = { "Complex Message", new JButton("A component"),
new Object[] { " Nested", " Array" }, "for JOptionPane" };
Object type[] = { "Animal", "Vegetable", "Mineral" };
int result = JOptionPane.showOptionDialog(this, msg, "Choose",
JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, type,
null);
System.out.println("Result (index)= " + result + " (" + type[result] + ")");
}
public static void main(String[] args) {
new Test2();
}
}