queuesbutton.java

这是一个八皇后问题的扩展

//定义图形界面上显示棋盘和皇后的按钮
import javax.swing.*;
import java.awt.*;

public final class QueuesButton extends JButton{
	private static final ImageIcon QueuesIcon
		=new ImageIcon(QueuesButton.class.getResource("images/Queue.png"));//皇后图标

	private static final ImageIcon noIcon=new ImageIcon(QueuesButton.class.getResource("images/NoPiece.png"));//不放置皇后时的图标
	private static final Insets noMargin=new Insets(0,0,0,0);
	public QueuesButton()
	{
		setIcon(noIcon);//初始化时不放置皇后
		setIconTextGap(0);
		setMargin(noMargin);
		setAlignmentX(Component.CENTER_ALIGNMENT);
		setAlignmentY(Component.CENTER_ALIGNMENT);
	}
	public void setPiece(final int piece){
		switch(piece){
			case 0://放置皇后
				setIcon(QueuesIcon);
				break;
			default://不放置皇后
				setIcon(noIcon);
				break;
		}
	}
	
}