import java.awt.event.KeyEvent;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.KeyStroke;

public class DisposeWithESC {

    private DisposeWithESC() {
    }

    public static void attach(JDialog jDialog) {
        jDialog.getRootPane().registerKeyboardAction(e -> {
            jDialog.dispose();
        }, KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), JComponent.WHEN_IN_FOCUSED_WINDOW);
    }

}