Java太陽系小游戲剖析和源碼詳解

Java太陽系小游戲剖析和源碼詳解。本站提示廣大學習愛好者：（Java太陽系小游戲剖析和源碼詳解）文章只能為提供參考，不一定能成為您想要的結果。以下是Java太陽系小游戲剖析和源碼詳解正文

比來看了面向對象的一些常識，然後隨著先生的講授做了一個太陽系各行星繞太陽轉的小游戲，來演習穩固一下比來學的常識：

用到常識點：類的繼續、辦法的重載與重寫、多態、封裝等

剖析：

1.須要加載圖片、繪圖

2.建一個面板，主頁面

3.行星類

後果圖：

先看一下源碼構造圖：

如今慢慢剖析各個類的功效：

1)對象類-----util包中

    --Constant類   封裝了游戲頂用到的常量

    --GameUtil類  封裝了游戲的圖片加載功效

    --MyFrame類  封裝了游戲面板的結構，用於各面板的父類

    ------之所以如許做，目標是為了封裝數據，便於法式的擴大

Constant.java

package util; 
 
public class Constant { 
  public static final int GAME_WIDTH = 800; 
  public static final int GAME_HEIGHT = 600; 
 
} 

GameUtil.java

package util; 
 
import java.awt.Image; 
import java.awt.image.BufferedImage; 
import java.io.IOException; 
import java.net.URL; 
 
import javax.imageio.ImageIO; 
 
/** 
 * 對象類（加載圖片） 
 * @author long 
 * 
 */ 
public class GameUtil { 
 
  private GameUtil(){ } //對象類平日將結構辦法公有 
   
  public static Image getImage(String path){ 
    URL u = GameUtil.class.getClassLoader().getResource(path); 
    BufferedImage img = null; 
    try { 
      img = ImageIO.read(u); 
    } catch (IOException e) { 
      e.printStackTrace(); 
    } 
    return img; 
  } 
} 

MyFrame.java

package util; 
 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
 
/** 
 * 游戲面板的父類 
 * @author long 
 * 
 */ 
public class MyFrame extends JPanel{ 
   
  /** 
   * 加載Frame的辦法 
   */ 
  public void launchFrame(){ 
    JFrame frame = new JFrame("MyGame"); 
    frame.add(this); 
    frame.setSize(Constant.GAME_WIDTH,Constant.GAME_HEIGHT); 
    frame.setAlwaysOnTop(true); // 設置其總在最上 
    frame.setLocationRelativeTo(null); // 設置窗體初始地位 
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    frame.setVisible(true); 
     
    new PaintThread().start(); 
  } 
   
  /** 
   * 界說一個重畫窗口的線程類，是一個外部類 
   * @author dell 
   * 
   */ 
  class PaintThread extends Thread { 
     
    public void run(){ 
      while(true){ 
        repaint(); 
        try { 
          Thread.sleep(40); //1s = 1000ms 
        } catch (InterruptedException e) { 
          e.printStackTrace(); 
        }   
      } 
    } 
     
  } 
   
  public static void main(String[] args) { 
    new MyFrame().launchFrame(); 
  } 
 
}

 2)重要的事宜處置類---solar包中
    --Planet類   行星類繼續至Star類

    --SolarFrame類  游戲主面板類繼續至MyFrame類

    --Star類  星球類，各個星球的父類

    --Test類  測試類，不須要解釋

Planet.java

package solar; 
 
import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Image; 
 
import util.GameUtil; 
 
/** 
 * 行星類，繼續至Star類 
 * @author long 
 * 
 */ 
public class Planet extends Star{ 
  //除圖片、坐標，行星沿著橢圓運轉：長軸、短軸、挪動速度、扭轉角度。繞著某個star運轉 
  double longAxis;  //橢圓長軸 
  double shortAxis; //橢圓短軸 
  double speed;   //飛翔速度 
  double degree;   //扭轉角度 
  Star center;    //環繞行星 
   
  public void draw(Graphics g){ 
    //g.drawImage(img, (int)x, (int)y, null); 
    super.draw(g); 
    drawTrace(g); 
    move(); 
  } 
   
  public void drawTrace(Graphics g){ 
    double traceX,traceY,traceWidth,traceHeight; 
    traceX = (center.x+center.w/2)-longAxis; 
    traceY = (center.y+center.h/2)-shortAxis; 
    traceWidth = 2*longAxis; 
    traceHeight = 2*shortAxis; 
     
    Color c = g.getColor(); 
    g.setColor(Color.blue); 
    g.drawOval((int)traceX, (int)traceY, (int)traceWidth, (int)traceHeight); 
    g.setColor(c); 
  } 
   
  public void move(){ 
    //沿著橢圓軌跡飛翔 
    x = center.x + longAxis * Math.cos(degree); 
    y = center.y + shortAxis * Math.sin(degree); 
    degree += speed; 
  } 
   
  public Planet(Image img,double x,double y){ 
    super(img,x,y); 
  } 
  public Planet(String imgpath,double x,double y){ 
    super(imgpath,x,y); 
  } 
  public Planet( Star center,Image img,double longAxis, 
          double shortAxis,double speed) { 
    super(); 
    this.x = (center.x+center.w/2) + longAxis; 
    this.y = (center.y+center.h/2) + shortAxis; 
    this.img = img; 
    this.longAxis = longAxis; 
    this.shortAxis = shortAxis; 
    this.speed = speed; 
    this.center = center; 
  } 
  public Planet( Star center,String imgPath,double longAxis, 
        double shortAxis,double speed) { 
    this(center,GameUtil.getImage(imgPath),longAxis,shortAxis,speed); 
  } 
   
   
 
}

SolarFrame.java

package solar; 
 
import java.awt.Graphics; 
import java.awt.Image; 
 
import util.Constant; 
import util.GameUtil; 
import util.MyFrame; 
 
public class SolarFrame extends MyFrame{ 
 
  int width = Constant.GAME_WIDTH/2; 
  int height = Constant.GAME_HEIGHT/2; 
   
  Image bg=GameUtil.getImage("images/bg.png"); 
   
  Star sun = new Star("images/sun.jpg",width,height); 
  Planet earth = new Planet(sun,"images/earth.png",100,60,0.1); 
  Planet mars = new Planet(sun,"images/mars.png",180,100,0.15); 
   
  @Override 
  public void paint(Graphics g) { 
    g.drawImage(bg, 0, 0, null); 
    sun.draw(g); 
    earth.draw(g);  
    mars.draw(g); 
  } 
 
  public static void main(String[] args) { 
    new SolarFrame().launchFrame(); 
  } 
 
} 

Star.java

package solar; 
 
import java.awt.Graphics; 
import java.awt.Image; 
 
import util.GameUtil; 
 
public class Star { 
  public Image img; 
  public double x,y; 
  int w,h; 
   
  public void draw(Graphics g){ 
    g.drawImage(img, (int)x, (int)y, null); 
  } 
 
  public Star(){ 
  }   
  public Star(Image img){ 
    this.img = img; 
    this.w = img.getWidth(null); 
    this.h = img.getHeight(null); 
  } 
  public Star(Image img,double x,double y){ 
    this(img); 
    this.x = x; 
    this.y = y; 
  }   
  public Star(String imgPath,double x,double y){ 
    this(GameUtil.getImage(imgPath),x,y); 
  } 
   
} 

總結：該小游戲對代碼的封裝處置的比擬好，便於法式的擴大，表現了面向對象的壯大，分歧的功效封裝在分歧的類與辦法中，把類的公共的部門封裝在父類中，進步代碼的重用性。後期各個類寫的進程中會有各類小成績與細節，但處置完這些後，前期想擴大行星的個數就比擬簡略了，new一個行星對象，然後畫的面板上便可。面向對象水太深，這只是初步小浏覽，仍需持續盡力專研！！！

以上就是Java太陽系小游戲剖析和源碼詳解，願望對年夜家進修java說話有所贊助。