JOptionPane5

.java

import javax.swing.JOptionPane;

public class Main {
	public static void main(String[] args) {
		String[] botones = {"Boton A", "Boton B", "Boton C", "Boton D"};
		int ventana = JOptionPane.showOptionDialog(null, 
						"Pulsa un boton:", 
						"Javadesde0.com", 
						JOptionPane.DEFAULT_OPTION, 
						JOptionPane.QUESTION_MESSAGE, null, 
						botones, botones[0]);
		if(ventana == 0) {System.out.println("Opcion A");} 
		else if(ventana == 1) {System.out.println("Boton B");}
		else if(ventana == 2) {System.out.println("Boton C");}
		else if(ventana == 3) {System.out.println("Boton D");}
	}
}