Also ich wollte nur mal kurz was ausprobieren mit einem ActionListener aber der Streicht mir genau zwei Sachen an, und zwar: einmal das ActionListener() und dann noch das Event.
Als Lösungsvorschlag bringt mir Eclipse: add unimplementet methods. Ich komm wirklich nicht weiter, wenn jemand den Fehler sieht bitte einfach kurz melden danke.
[SPOILER]```
package gui;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
public class NewToDo extends javax.swing.JFrame{
private static final long serialVersionUID = -8656568610869382573L;
//center position components
private Toolkit t;
private int x = 0, y = 0, width = 800, height = 600;
//menu components
private JMenuBar mbar1;
private JMenu mbar1_m1;
private JMenu mbar1_m2;
private JMenu mbar1_m3;
private JMenuItem mbar1_m1_mi1;
private JMenuItem mbar1_m1_mi2;
private JMenuItem mbar1_m1_mi3;
private JMenuItem mbar1_m2_mi1;
private JMenuItem mbar1_m2_mi2;
private JMenuItem mbar1_m2_mi3;
private JMenuItem mbar1_m3_mi1;
private JMenuItem mbar1_m3_mi2;
private JMenuItem mbar1_m3_mi3;
//constructor
public NewToDo() {
//center position of frame
t = Toolkit.getDefaultToolkit();
Dimension d = t.getScreenSize();
x = (int) ((d.getWidth() - width) /2) ;
y = (int) ((d.getHeight() - height)/ 2);
setTitle("To do list");
setBounds(x, y, 800, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//add all components
this.initComponents();
this.initListeners();
setVisible(true);
}
private void initComponents(){
//components
this.mbar1 = new JMenuBar();
this.mbar1_m1 = new JMenu("Menu 1");
this.mbar1_m2 = new JMenu("Menu 2");
this.mbar1_m3 = new JMenu("Menu 3");
this.mbar1_m1_mi1 = new JMenuItem("Item 1/1");
this.mbar1_m1_mi2 = new JMenuItem("Item 1/2");
this.mbar1_m1_mi3 = new JMenuItem("Item 1/3");
this.mbar1_m2_mi1 = new JMenuItem("Item 2/1");
this.mbar1_m2_mi2 = new JMenuItem("Item 2/2");
this.mbar1_m2_mi3 = new JMenuItem("Item 2/3");
this.mbar1_m3_mi1 = new JMenuItem("Item 3/1");
this.mbar1_m3_mi2 = new JMenuItem("Item 3/2");
this.mbar1_m3_mi3 = new JMenuItem("Item 3/3");
//adds
this.mbar1.add(this.mbar1_m1);
this.mbar1.add(this.mbar1_m2);
this.mbar1.add(this.mbar1_m3);
this.mbar1_m1.add(this.mbar1_m1_mi1);
this.mbar1_m1.add(this.mbar1_m1_mi2);
this.mbar1_m1.add(this.mbar1_m1_mi3);
this.mbar1_m2.add(this.mbar1_m2_mi1);
this.mbar1_m2.add(this.mbar1_m2_mi2);
this.mbar1_m2.add(this.mbar1_m2_mi3);
this.mbar1_m3.add(this.mbar1_m3_mi1);
this.mbar1_m3.add(this.mbar1_m3_mi2);
this.mbar1_m3.add(this.mbar1_m3_mi3);
this.setJMenuBar(this.mbar1);
}
private void initListeners(){
this.mbar1_m1_mi1.addActionListener(new ActionListener(){
@override
public void actionPerformed(ActionEvent e){
JOptionPane.showMessageDialog(null, "Test");
}
});
}
//main method
public static void main(String[] args) {
new NewToDo();
}
}
[/SPOILER]
*** Edit ***
Ich hab den Fehler selber gefunden danke :P