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Ning2018 / JavaFundamentals

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JavaSwing ActionListener #6

Open Ning2018 opened 6 years ago

Ning2018 commented 6 years ago

JMenuItem menuitem = new JMenuItem("menuitem"); menuitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ label.setText("......"); } });

JMenuItem menuitem = new JMenuItem("menuitem"); menuitem.addActionListener(this); public void actionPerformed(ActionEvent e){ label.setText("......"); }

JFrame f = new JFrame("PopupMenu Example"); f.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent e){ popupmenu.show(f, e.getX(), e.getY()); } });

button.addItemListener(this); public void itemStateChanged(ItemEvent eve){ if(button.isSelected()) button.setText("OFF"); else button.setText("ON"); }