startscreen.java

一个游戏的开始界面,简单的一个开始界面,但还挺不错的

package java_game_a;
import java.awt.*;
import java.util.*;
public class StartScreen //开始画面类
{
//==========数据成员===================
	int width,height,StringWidth,StringHeight,Ascent,Descent,
	x,y;
	int ImageLeftBound,ImageRightBound,Imagex,Imagey,ImageWidth,
	ImageHeight,VX;
	Font F1,F2,F3;
	Image Normal,bkImage,Hit,currentImage;
	String ChineseTitle, EnglishTitle,PressEnter;
	HitPigHead game;
	Random r;
	boolean showPressEnter;                                                        
	FontMetrics FM;
	//=========函数成员==============
	public StartScreen(int AppletWidth,int AppletHeight,HitPigHead 
			game,Image normal,Image hit,Image bk){
		r=new Random();
		F1=new Font("TimesRoman",Font.BOLD,72);
		F2=new Font("TimesRoman",Font.BOLD+Font.ITALIC,36);
		F3=new Font("TimesRoman",Font.BOLD,20);
		ChineseTitle="棒打猪头";//使用F1
		EnglishTitle="Hit Pig's Head";
		PressEnter="<<<==请按Enter进入游戏==>>>";
		width=AppletWidth;
		height=AppletHeight;
		Normal=normal;//小猪图象1
		Hit=hit;//小猪图象2
		bkImage=bk;//背景图象
		ImageWidth=Normal.getWidth(game);//小猪图象的宽度
		ImageHeight=Normal.getHeight(game);
	    ImageLeftBound=25;//小猪图象移动的左边界
	    ImageRightBound=AppletWidth-(25+ImageWidth);
        Imagex=ImageRightBound;//小猪移动起始位置
        VX=-3;
        this.game=game;
        currentImage=Normal;//指定目前图象为第一张图片
        showPressEnter=true;
	}
	
	public void UpdateStatus()//更新图片状态的函数
	{
		Imagex=Imagex+VX;
		if(Imagex<=ImageLeftBound)//如果碰到左边界
		{
			currentImage=Hit;
			Imagex=ImageLeftBound;
			VX=-VX;
		}
		if(Imagex>=ImageRightBound)//如果碰到右边界
		{
		currentImage=Normal;
		Imagex=ImageRightBound;
		VX=-VX;
		}
		   if(showPressEnter==true)
		   {
		      if((r.nextInt(5)+1)%5==0)
		    	showPressEnter=false;
		    }
		   else{
			  if((r.nextInt(5)+1)%5==0)
				 showPressEnter=true;
		   }
	}
	public void paintScreen(Graphics g)//绘制动画函数
	{
		g.clearRect(0, 0, width, height);//清除次画面
		g.setFont(F1);
		FM=g.getFontMetrics();
		Ascent=FM.getAscent();
		Descent=FM.getDescent();
		StringWidth=FM.stringWidth(ChineseTitle);
		StringHeight=Ascent+Descent;
		x=(width-StringWidth)/2;
		y=Ascent;
		g.drawImage(bkImage, 0, 0, game);
		g.setColor(Color.white);//设置前景色
		g.drawString(ChineseTitle, x, y);
		y=StringHeight;
		g.drawLine(x, y, x+StringWidth, y);//绘制线段1
		x=x+30;
		y=y+5;
		g.drawLine(x, y, x+StringWidth-60, y);//绘制线段2
		//================================================
		g.setFont(F2);
		FM= g.getFontMetrics();	
		Ascent=FM.getAscent();
		Descent=FM.getDescent();
		StringWidth=FM.stringWidth(EnglishTitle);
		StringHeight=Ascent+Descent;
		x=(width-StringWidth)/2;
		y=y+Ascent;
		g.drawString(EnglishTitle, x, y);
		//================================================
		Imagey=y+Descent+30;
		g.drawImage(currentImage, Imagex, Imagey, game);
		//================================================
		g.setFont(F3);
		FM=g.getFontMetrics();
		Ascent=FM.getAscent();
		Descent=FM.getDescent();
		StringWidth=FM.stringWidth(PressEnter);
		StringHeight=Ascent+Descent;
		x=(width-StringWidth)/2;
		y=Imagey+ImageHeight+Ascent+30;
		if(showPressEnter)
			g.drawString(PressEnter, x, y);
		   
		
		}
	
}