ersbox.java

java实现的

/**
 * File: ErsBox.java
 * User: Administrator
 * Describe: 俄罗斯方块的 Java 实现
 */

import java.awt.*;

/**
 * 方格类，是组成块的基本元素，用自己的颜色来表示块的外观 
 */
public  class ErsBox implements Cloneable
//(A class implements the Cloneable interface to indicate to the Object.clone() method that it is legal for that method to make a field-for-field copy of instances of that class)
{
	private boolean isColor;
	private Dimension size = new Dimension();
    //(Creates an instance of Dimension with a width of zero and a height of zero)
	
	/**
	 * 方格类的构造函数
	 * @param isColor 是不是用前景色来为此方格着色，
	 *      true前景色，false用背景色
	 */
	public ErsBox(boolean isColor) 
	{
		this.isColor = isColor;
	}

	/**
	 * 此方格是不是用前景色表现
	 * @return boolean,true用前景色表现，false用背景色表现
	 */
	public boolean isColorBox()//用于说明方格在画布上显示的方式,即用颜色说明
	{return isColor;}

	/**
	 * 设置方格的颜色，
	 * @param isColor boolean,true用前景色表现，false用背景色表现
	 */
	public void setColor(boolean isColor)
	{this.isColor = isColor;}

	/**
	 * 得到此方格的尺寸
	 * @return Dimension,方格的尺寸
	 */
	public Dimension getSize() 
	{
		return size;//size是Dimension 的实例
		
	}

	/**
	 * 设置方格的尺寸
	 * @param size Dimension,方格的尺寸
	 */
	public void setSize(Dimension size) 
	{
		this.size = size;
	}

	/**
	 * 覆盖Object的Object clone()，实现克隆
	 * @return Object,克隆的结果
	 */
	public Object clone() //Cloneable接口的抽象方法在此实现
	{
		Object cloned = null;
		try 
		{
			cloned = super.clone();
		} catch (Exception ex) {
			ex.printStackTrace();
		}

		return cloned;
	}
}