JF也需要repaint。class shijian extends KeyAdapter { public void keyPressed(KeyEvent e) {
super.keyPressed(e);
if (e.getKeyCode() == KeyEvent.VK_UP) {
System.out.println("上");
hb.y-=5;
} else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
System.out.println("下");
hb.y += 5;
}
hb.repaint();
JF.repaint();
} }
super.keyPressed(e);
if (e.getKeyCode() == KeyEvent.VK_UP) {
System.out.println("上");
hb.y-=5;
} else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
System.out.println("下");
hb.y += 5;
}
hb.repaint();
JF.repaint();
} }
解决方案 »
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