Question

Java用swing窗体写2个可控制移动的按钮，鼠标点击哪个键盘上下左右移动哪个，在线等，谢谢了

Answer 1

代码还可以优化，你自己修改吧！代码有点小问题，运行后，按钮2会全屏，你按键盘方向键就会好了！这个问题你自己想办法修改吧。不过可以实现你要的功能。
public class PaintovalFrame extends JFrame {
private static JButton objT1;
private static JButton objT2;
public PaintovalFrame() {
setSize(500,500);
objT1 = new JButton("1");
objT1.setBounds(120, 40, 50, 40);
add(objT1);
objT2 = new JButton("2");
objT2.setBounds(20, 40, 50, 40);
add(objT2);
objT1.addKeyListener(new KeyAdapter(){
public void keyPressed(KeyEvent e)
{
if(e.getKeyCode()==e.VK_UP){
objT1.setBounds(objT1.getX(), objT1.getY() - 10, 50, 40);
} else if(e.getKeyCode()==e.VK_DOWN){
objT1.setBounds(objT1.getX(), objT1.getY() + 10, 50, 40);
} else if(e.getKeyCode()==e.VK_LEFT){
objT1.setBounds(objT1.getX() - 10, objT1.getY(), 50, 40);
} else if(e.getKeyCode()==e.VK_RIGHT){
objT1.setBounds(objT1.getX() + 10, objT1.getY(), 50, 40);
}
}
});
objT2.addKeyListener(new KeyAdapter(){
public void keyPressed(KeyEvent e)
{
if(e.getKeyCode()==e.VK_UP){
objT2.setBounds(objT2.getX(), objT2.getY() - 10, 50, 40);
} else if(e.getKeyCode()==e.VK_DOWN){
objT2.setBounds(objT2.getX(), objT2.getY() + 10, 50, 40);
} else if(e.getKeyCode()==e.VK_LEFT){
objT2.setBounds(objT2.getX() - 10, objT2.getY(), 50, 40);
} else if(e.getKeyCode()==e.VK_RIGHT){
objT2.setBounds(objT2.getX() + 10, objT2.getY(), 50, 40);
}
}
});
}
public static void main(String[] args) {
PaintovalFrame objPane = new PaintovalFrame();
objPane.setVisible(true);
}
}

Answer 2

点击就是获得焦点。

只要两个按钮都监听一个键盘事件就可以了。

import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
public class JButtonMoveFrame extends JFrame {
    private JButton objT1;
    private JButton objT2; 
    public JButtonMoveFrame() { 
        super("JButtonMoveFrame");
        this.setSize(500,500); 
        this.setLayout(null);
        objT1 = new JButton("1");
        objT1.setBounds(120, 40, 50, 40);
        objT2 = new JButton("2");
        objT2.setBounds(20, 40, 50, 40);
        this.add(objT1);
        this.add(objT2);
        this.setVisible(true); 
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        KeyAdapter kl = new KeyAdapter(){
            public void keyPressed(KeyEvent e){ 
                JButton btn=(JButton)e.getSource();
                
                if(e.getKeyCode()==e.VK_UP){
                    btn.setBounds(btn.getX(), btn.getY() - 10, 50, 40);
                } else if(e.getKeyCode()==e.VK_DOWN){
                    btn.setBounds(btn.getX(), btn.getY() + 10, 50, 40);
                } else if(e.getKeyCode()==e.VK_LEFT){
                    btn.setBounds(btn.getX() - 10, btn.getY(), 50, 40);
                } else if(e.getKeyCode()==e.VK_RIGHT){
                    btn.setBounds(btn.getX() + 10, btn.getY(), 50, 40);
                }
            }
        };
        
        objT1.addKeyListener(kl);
        objT2.addKeyListener(kl); 
    }
    public static void main(String[] args) {
        new JButtonMoveFrame(); 
    } 
}