drawnextshape.java

Java 开发的俄罗斯方块游戏

import java.awt.*;

//此类显示下一个游戏块
public class DrawNextShape extends Panel{
	
	static int nextShapeTable[][];//此数组标志下一个游戏块
	int width, height;//控件的宽和高
	static int x = 5;//
	static int y = 5;
	int distance ;//单元块间隔
	int localWith , localHeight;//单元块的宽和高
	Image img;//为防止屏幕闪烁,采用双缓冲技术
	Graphics bg;//img和bg均为防止闪烁而定义

	public DrawNextShape(){		
		width = 100;
		height = 100;
		distance = 20;
		localWith = 18;
		localHeight = 18;
		nextShapeTable = new int[x][y];
		img=createImage(width,height); 

		
		setLayout(null);//不使用布局管理器,自己定义
		setSize(this.width, this.height);
	}
	
	//将标识数组清空
	public static void init(){
		for(int i = 0; i < x; i ++){
			for(int j = 0; j < y; j ++){
				nextShapeTable[i][j] = 0;
			}
		}
	}
	
	
	//update方法就是双缓冲技术的实例
	public void update(Graphics g){
		
		if(img == null){
			img = createImage(width, height);
			bg = img.getGraphics();
		}
		else{
			bg = img.getGraphics();
		}
		paint(bg);
		g.drawImage (img, 0, 0, this);
	}	

	public void paint(Graphics g){

		g.setColor(Color.white);
		g.fillRect(0,0, width, height);

		for(int i = 0; i < getX(); i ++){
			for(int j = 0; j <getY(); j ++){
				if(nextShapeTable [i][j] == 1){
					g.setColor(Color.black);
					g.fillRect(	distance *j ,  distance *i, localWith, localHeight);
				}
				else{
					g.setColor(Color.lightGray);
					g.fillRect( distance *j , distance *i, localWith, localHeight);
				}
			}
		}
	}

	public int getX() {
		return x;
	}

	public int getY() {
		return y;
	}
}