java graphics program代写 cs代码代写

java graphics program代写科目Create a graphics program to draw moving stars and other type of shapes.

Ask user to input “how many objects do you want to create?“

```
draw (how many / 2) stars
```
```
draw (how many / 2) other shapes
```

apply collision detection to all the stars and shapes (right-left-top-bottom), and rebound after collision

You must use random class to set initial values of each shape (x, y, size, speedx, speedy, color, etc)



Sample code here:

import java.awt.Color;

import java.awt.Graphics;

import javax.swing.JFrame;

import java.util.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;







class Star {

    int x;

    int y;

    int size;

    int speedX;

    int speedY;

    Color color;

}




public class cs210Star extends JFrame {

    public static ArrayList<Star> myStar = new ArrayList<>();

    static int width = 800;

    static int height = 600;




    static int howMany = 30;




    public cs210Star() {     // Constructor (Ch08)

        super("Your Title");

        setBounds(100, 100, width, height);  // at your monitor

        setResizable(false);

        setVisible(true);

        setDefaultCloseOperation(EXIT_ON_CLOSE);

    }







    public static void createStar() {

        Random rand = new Random();

        int R, G, B;

        for (int i = 0; i < howMany; i++) {

            Star s = new Star();

            R = rand.nextInt(256);

            G = rand.nextInt(256);

            B = rand.nextInt(256);

            s.color = new Color(R, G, B);

            s.x = rand.nextInt(width);

            s.y = rand.nextInt(height);

            s.size = rand.nextInt(10) + 10;

            s.speedX = rand.nextInt(5) + 1;

            s.speedY = rand.nextInt(5) + 1;

            myStar.add(s);

        }

    }




    public void paint(Graphics g) {

        g.setColor(Color.BLACK);

        g.fillRect(0, 0, width, height);

        for (int i = 0; i < myStar.size(); i++) {   // AllayList Size

            g.setColor(myStar.get(i).color);

            myStar.get(i).x += myStar.get(i).speedX;

            myStar.get(i).y += myStar.get(i).speedY;




            drawStar(g, myStar.get(i).x, myStar.get(i).y, myStar.get(i).size);

        }

        try {

            Thread.sleep(10);

        } catch (Exception exc) {

        }

        repaint();

    }




    public void drawStar(Graphics g, int sx, int sy, int size) {

        int[] xCoords = new int[10];

        int[] yCoords = new int[10];

        int ang = 90 - 36;

        double rad;

        double PI = 3.14159;




        for(int i = 0; i < 10; i++) {

            if (i % 2 == 0) rad = size * 0.38;

            else rad = size;

            xCoords[i] += (int)(rad * Math.cos(PI * ang / 180.0));

            yCoords[i] -= (int)(rad * Math.sin(PI * ang / 180.0));

            ang += 36;

            xCoords[i] += getX();

            yCoords[i] += getY();

        }

        g.fillPolygon(xCoords, yCoords, 10);




    }




    public static void main(String[] args) {

        createStar();

        new cs210Star();

    }

}

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