jebem ja tvojho boha

zapocetA.java

// uplne hore importy
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

// dalej dakde v pici v kode kde mas zadefinovany ten btnNewButton_5
JMenuItem btnNewButton_5 = new JMenuItem("Ukončiť");
btnNewButton_5.setMnemonic(KeyEvent.VK_E);
btnNewButton_5.setToolTipText("Zavrieť aplikáciu");
btnNewButton_5.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent event) {
        System.exit(0);
    }
});