String tittel= "Velkommen";
String s=javax.swing.JOptionPane.showInputDialog("s1");
String s1=javax.swing.JOptionPane.showInputDialog("s2");
boolean like = s.equals(s1);
String info = "Tekstene er like: " + like;
javax.swing.JOptionPane.showMessageDialog(null,info,tittel,javax.swing.JOptionPane.PLAIN_MESSAGE);