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Re: keylistener
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Đầu tiên cho Focus cái JPanel rùi cho nó lắng nghe KeyListener trên chínhd nó là OK. [color=red]this.setFocusable(true); this.addKeyListener((KeyListener)this);[/color] [code] package AppKeyListener; import java.awt.Color; import java.awt.Graphics; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JPanel; public class MyPanel extends JPanel implements KeyListener { …

Software Development java user-interface:gui
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