针对JFrame的无响应的KeyListener
KeyListenerJFrame
System.out.println("test");addKeyListener(new KeyListener() {
public void keyPressed(KeyEvent e) { System.out.println( "tester"); }
public void keyReleased(KeyEvent e) { System.out.println("2test2"); }
public void keyTyped(KeyEvent e) { System.out.println("3test3"); }});testKeyListener
JFrameKeyListener
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