如何将对象从一个JButton移动到另一个JButton？

Question

基本上，我创建了一个充满了扩展Jbuttons的boardFields的板，实现了ActionListeners。 在BoardField中添加“Unit”之后，我无法找到将其移动到另一个boardField的方法。 这是代码。

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;

@SuppressWarnings("serial")
public class BoardField extends JButton implements ActionListener,
    MouseListener {

public Boolean isOccupied;
public Unit occupiedBy;
public Integer locationOnBoard;
public Unit beingMoved;
public Boolean clicked = false;

public BoardField(Integer locationOnBoard, Unit occupiedBy,
        Boolean isOccupied) {
    super();
    this.locationOnBoard = locationOnBoard;
    this.occupiedBy = occupiedBy;

    this.addActionListener(this);
    this.addMouseListener(this);

}

@Override
public void actionPerformed(ActionEvent e) {
    System.out.println("button");
    if (clicked == false) {
        setBeingMoved(occupiedBy);
        occupiedBy = null;
        clicked = true;
    } else {
        setOccupiedBy(beingMoved);
        clicked = false;
        beingMoved = null;
    }

}

@Override
public void mouseClicked(MouseEvent arg0) {
    System.out.println("clicked");

}

@Override
public void mouseEntered(MouseEvent arg0) {
    System.out.println("entered");

    if (occupiedBy != null) {
        setText(" " + occupiedBy.getUnitType().getName() + ": "
                + occupiedBy.getQuantity());
    } else {
        setText("null");
    }

}`

我很抱歉代码格式化，但即使我按下ctrl + K它看起来像这样。 谢谢你的帮助。