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7. java lecture events

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弍舒弍仂从舒 仂弍亳亶 弌仂弍亳亠 仂弍亠从 仗亠亳舒仍仆仂亞仂 从仍舒舒, 仂仗亳于舒ﾑ亳亶 亳亰仄亠仆亠仆亳亠 仂仂礌亳 仂弍亠从舒 亳仂仆亳从舒. 仍舒 亟仍 仂弍舒弍仂从亳 仂弍亳亶 仆舒仂亟 于 仗舒从亠亠 java.awt.event 1
弍舒弍仂从舒 仂弍亳亶 仍舒 仂弍亳亶 EventObject ActionEvent AWTEvent ContainerEvent AdjustmentEvent FocusEvent ComponentEvent PaintEvent ItemEvent WindowEvent TextEvent InputEvent KeyEvent MouseEvent 2
弍舒弍仂从舒 仂弍亳亶 仍舒 仂弍亳亶 亠仂亟 从仍舒舒 EventObject: - Object getSource() 仍从舒 仆舒 仂弍亠从亳仂仆亳从 仂弍亳 - String toString() 亠从仂于仂亠 仂仗亳舒仆亳亠 仂弍亳 3
弍舒弍仂从舒 仂弍亳亶 仂仆亳从亳 仂弍亳亶 仂仆亳从 弌仂弍亳亠 仂亞亟舒 于仂亰仆亳从舒亠 JButton ActionEvent 舒亢舒舒 从仆仂仗从舒 JCheckBox ItemEvent 弌弍仂/舒仆仂于从舒 仍舒亢从舒 JRadioButton ItemEvent 弌弍仂/舒仆仂于从舒 仍舒亢从舒 JComboBox ActionEvent ItemEvent 弍仂 仍亠仄亠仆舒 仗亳从舒 亰仄亠仆亠仆亳亠 仂仂礌亳 仍亠仄亠仆舒 JList ListSelection Event 亰仄亠仆亠仆亳亠 仂仂礌亳 仍亠仄亠仆舒 JMenuItem ActionEvent ItemEvent 亰仄亠仆亳仍仂 仂-亠 仗仆从舒 仄亠仆 丐仂 亢亠 亟仍 仗仆从舒 仄亠从仂亶 4
弍舒弍仂从舒 仂弍亳亶 仂仆亳从亳 仂弍亳亶 仂仆亳从 弌仂弍亳亠 仂亞亟舒 于仂亰仆亳从舒亠 JScrollbar AdjustmentEvent 舒仆亳仗仍亳亳 仗仂仍仂舒仄亳 仗仂从从亳 JTextField JTextArea TextEvent 于仂亟 亳仄于仂仍仂于 JFrame JWindow Jdialog WindowEvent ﾐ英亠 亟亠亶于亳 仂从仆仂仄 (仂从/亰舒从, 于亠仆/舒亰于亠仆 亳 .仗.) 亠 仂亞舒仆 仗舒于仍亠仆亳 FocusEvent 仂仄仗仂仆亠仆 仗仂仍舒亠 亳仍亳 亠磳 仂从 于于仂亟舒 亠 ContainerEvent 从仂仆亠亶仆亠 仂仄仗仂仆亠仆 亟仂弍舒于仍磳 亳仍亳 亟舒仍磳 亳亰 从仂仆亠亶仆亠舒 5
弍舒弍仂从舒 仂弍亳亶 丕仂于仆亳 仂弍亳亶 仂从仂仂于仆亠于亠: 于亠 于亠仗亠亠亳仍亠仆仆亠. 亳亰从仂仂于仆亠于亠: KeyEvent, MouseEvent, MouseEvent (move) - low MouseEvent (click) low ActionEvent - high 6
弍舒弍仂从舒 仂弍亳亶 仆亠亠亶 - 仍舒亠仍亳 仍 从舒亢亟仂亞仂 亳仗舒 仂弍亳亶 亠于亠 于仂亶 亳仆亠亠亶仍舒亠仍: ActionEvent ActionListener ItemEvent ItemListener WindowEvent WindowListener 亳 .亟. 亳仆亠亠亶亠-仍舒亠仍亠 仂仗亳舒仆 仄亠仂亟, 仂弍舒弍舒于舒ﾑ亳亠 仂弍亳 亟舒仆仆仂亞仂 从仍舒舒. 7
弍舒弍仂从舒 仂弍亳亶 仍仂从亳 仗仂仍亳于舒仆亳 仍仂从 仗仂仍亳于舒仆亳 从仍舒, 亠舒仍亳亰ﾑ亳亶 亳仆亠亠亶-仍舒亠仍 (亠舒仍亳亰ﾑ亳亶 于亠 亠亞仂 仄亠仂亟). 仍 仂弍舒弍仂从亳 仂弍亳 仆亠仂弍仂亟亳仄仂: 1. 弌仂亰亟舒 弍仍仂从 仗仂仍亳于舒仆亳 2. 弌于磶舒 弍仍仂从 仗仂仍亳于舒仆亳 亳仂仆亳从仂仄 仂弍亳 8
弍舒弍仂从舒 仂弍亳亶 仍仂从亳 仗仂仍亳于舒仆亳 丼仂弍 于磶舒 弍仍仂从仂仄 仗仂仍亳于舒仆亳, 从仍舒-亳仂仆亳从亳 仂弍亳 亟仂仍亢仆 仗仂仍亳 仍从 仆舒 从亰亠仄仗仍 弍仍仂从舒 仗仂仍亳于舒仆亳 (从仍舒舒-仂弍舒弍仂亳从舒 仂弍亳) 亰舒亠亞亳亳仂于舒 弍仍仂从 仗仂仍亳于舒仆亳: public void addTypeListener(TypeListener obj) 亞亟亠 Type 仂 亳仄 仂弍亳, obj 仍从舒 仆舒 从亰亠仄仗仍 从仍舒舒-仂弍舒弍仂亳从舒 仂弍亳. 亠仂亟, 从仂仂亠 亠亞亳亳ﾑ 弍仍仂从 仗仂仍亳于舒仆亳, 仂弍亠仗亠亳于舒ﾑ 亞亠仆亠亳ﾑ亳仄 仂弍亳亠 亳仂仆亳从仂仄. 9
弍舒弍仂从舒 仂弍亳亶 仍仂从亳 仗仂仍亳于舒仆亳: 仆亳于亠舒仆亳亠 仆亠亠亶仍舒亠仍 仂仆亳从 仂弍亳 implements 仍仂从 仗仂仍亳于舒仆亳 addTypeListener(TypeListener obj) 10
弍舒弍仂从舒 仂弍亳亶 仍仂从亳 仗仂仍亳于舒仆亳: 仄仍亳于亠舒仆亳亠 addTypeListener(TypeListener obj) 仍仂从 仗仂仍亳于舒仆亳 1 仂仆亳从 仂弍亳 addTypeListener(TypeListener obj) 仍仂从 仗仂仍亳于舒仆亳 2 仍仂从 仗仂仍亳于舒仆亳 3 11
弍舒弍仂从舒 仂弍亳亶 仍仂从亳 仗仂仍亳于舒仆亳: 仆亠从仂仍从仂 亳仂仆亳从仂于 仂仆亳从 仂弍亳 仂仆亳从 仂弍亳 仂仆亳从 仂弍亳 addTypeListener(TypeListener obj) 仍仂从 仗仂仍亳于舒仆亳 addTypeListener(TypeListener obj) 12
弍舒弍仂从舒 仂弍亳亶 弌 仗仂仄仂 仂亟亠仍仆仂亞仂 从仍舒舒 class TextMove implements ActionListener { private JTextField jtf; TextMove(JTextField jtf) { this.jtf = jtf; } public void actionPerformed(ActionEvent obj) { jtf.setText("Button pressed"); } } 13
弍舒弍仂从舒 仂弍亳亶 弌 仗仂仄仂 仂亟亠仍仆仂亞仂 从仍舒舒 class MyNotebook extends JFrame {public static void main(String args[ ]) {JFrame jf = new JFrame(弍舒弍仂从舒 仂弍亳 ActionEvent"); Container cp = jf.getContentPane(); jf.setLayout(new FlowLayout()); JButton jb = new JButton("OK"); JTextField jtf = new JTextField(20); cp.add(jb);cp.add(jtf); jb.addActionListener(new TextMove(jtf)); jf.setVisible(true); } } 14
弍舒弍仂从舒 仂弍亳亶 弌 仗仂仄仂 仂亟亠仍仆仂亞仂 从仍舒舒 15
弍舒弍仂从舒 仂弍亳亶 仆亳 从仍舒舒-亳仂仆亳从舒 class MyNotebook extends JFrame implements ActionListener {private JTextField jtf; public static void main(String args[ ]) {JFrame jf = new JFrame(弍舒弍仂从舒 仂弍亳 ActionEvent"); Container cp = jf.getContentPane(); jf.setLayout(new FlowLayout()); JButton jb = new JButton("OK"); JTextField jtf = new JTextField(20); 16
弍舒弍仂从舒 仂弍亳亶 仆亳 从仍舒舒-亳仂仆亳从舒 cp.add(jb); cp.add(jtf); jb.addActionListener(this); jf.setVisible(true); } public void actionPerformed(ActionEvent obj) { jtf.setText("Button pressed"); } } 17
弍舒弍仂从舒 仂弍亳亶 弌 仗仂仄仂 于仍仂亢亠仆仆仂亞仂 从仍舒舒 class MyNotebook extends JFrame {private JTextField jtf; public static void main(String args[ ]) {JFrame jf = new JFrame(弍舒弍仂从舒 仂弍亳 ActionEvent"); Container cp = jf.getContentPane(); jf.setLayout(new FlowLayout()); JButton jb = new JButton("OK"); JTextField jtf = new JTextField(20); 18
弍舒弍仂从舒 仂弍亳亶 弌 仗仂仄仂 于仍仂亢亠仆仆仂亞仂 从仍舒舒 cp.add(jb); cp.add(jtf); jb.addActionListener(new TextMove()); jf.setVisible(true); } class TextMove implements ActionListener {public void actionPerformed(ActionEvent obj) { jtf.setText("Button pressed"); } } 19
弍舒弍仂从舒 仂弍亳亶 弌 仗仂仄仂 舒仆仂仆亳仄仆仂亞仂 于仍仂亢亠仆仆仂亞仂 从仍舒舒 jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent obj) { jtf.setText("Button pressed"); } } ); 20
弍舒弍仂从舒 仂弍亳亶 亠仂亟 亳仆亠亠亶舒 ActionListener void actionPerformed(ActionEvent obj) 亠仂亟 亳仆亠亠亶舒 AdjustmentListener void adjustmentValueChanged(AdjustmentEvent obj) 21
弍舒弍仂从舒 仂弍亳亶 亠仂亟 亳仆亠亠亶舒 ComponentListener void ComponentResized(ComponentEvent obj) void ComponentMoved(ComponentEvent obj) void ComponentShown(ComponentEvent obj) void ComponentHidden(ComponentEvent obj) 亠仂亟 亳仆亠亠亶舒 ContainerListener void componentAdded(ContainerEvent obj) void componentRemoved(ContainerEvent obj) 22
弍舒弍仂从舒 仂弍亳亶 亠仂亟 亳仆亠亠亶舒 FocusListener void focusGained(FocusEvent obj) void focusLost(FocusEvent obj) 亠仂亟 亳仆亠亠亶舒 ItemListener void ItemStateChanged(ItemEvent obj) 亠仂亟 亳仆亠亠亶舒 KeyListener public void keyTyped(KeyEvent obj); public void keyPressed(KeyEvent obj); public void keyReleased(KeyEvent obj); 23
弍舒弍仂从舒 仂弍亳亶 亠仂亟 亳仆亠亠亶舒 MouseListener public void mouseClicked(MouseEvent obj); public void mousePressed(MouseEvent obj); public void mouseReleased(MouseEvent obj); public void mouseEntered(MouseEvent obj); public void mouseExited(MouseEvent obj); 亠仂亟 亳仆亠亠亶舒 MouseMotionListener public void mouseDragged(MouseEvent obj); public void mouseMoved(MouseEvent obj); 24
弍舒弍仂从舒 仂弍亳亶 亠仂亟 亳仆亠亠亶舒 TextListener void textValueChanged(TextEvent obj) 亠仂亟 亳仆亠亠亶舒 WindowListener public void windowOpened(WindowEvent obj); public void windowClosed(WindowEvent obj); public void windowClosing(WindowEvent obj); public void windowActivated(WindowEvent obj); public void windowDeactivated(WindowEvent obj); public void windowIconified(WindowEvent obj); public void windowDeiconified(WindowEvent obj); 25
弍舒弍仂从舒 仂弍亳亶 仍舒-舒亟舒仗亠 仍 亠舒仍亳亰舒亳亳 亳仆亠亠亶舒-仍舒亠仍 仆亠仂弍仂亟亳仄仂 仂仗亠亟亠仍亳 于亠 亠亞仂 仄亠仂亟. 仍亳 仆亠仂弍仂亟亳仄仂 仂弍舒弍舒于舒 于 仗仂亞舒仄仄亠 仂仍从仂 仆亠从仂仂亠 亳亰 仂弍亳亶, 仂弍舒弍仂从舒 从仂仂 仗亠亟仄舒亳于舒亠 从仂仆从亠仆仄 亳仆亠亠亶仂仄-仍舒亠仍亠仄, 舒 于亠 仗仂亳亠 亳亞仆仂亳仂于舒, 仂 仄仂亢仆仂 于仂仗仂仍亰仂于舒 仗亠亳舒仍仆仄 从仍舒舒仄亳, 从仂仂亠 仆舒亰于舒ﾑ 从仍舒舒仄亳-舒亟舒仗亠舒仄亳. 仍舒舒亟舒仗亠 仂弍亠仗亠亳于舒ﾑ 仗 亠舒仍亳亰舒亳 于亠 仄亠仂亟仂于 亳仆亠亠亶舒, 仂 亟舒亠 于仂亰仄仂亢仆仂 仆舒仍亠亟仂于舒 从仍舒仂弍舒弍仂亳从 仂弍亳 仂 从仍舒舒-舒亟舒仗亠舒 亳 亠舒仍亳亰仂于于舒 于 仆亠仄 仆亠 于亠 仄亠仂亟 亳仆亠亠亶舒, 舒 仍亳 亠 从仂仂亠 仆亠仂弍仂亟亳仄. 26
弍舒弍仂从舒 仂弍亳亶 仍舒-舒亟舒仗亠 弌仗亳仂从 从仍舒仂于-舒亟舒仗亠仂于: - ComponentAdapter - ContainerAdapter - FocusAdapter - KeyAdapter - MouseAdapter - MouseMotionAdapter - WindowAdapter 27

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