Java 使月球绕地球旋转
我在创造一个简单的太阳系。地球绕着太阳转。现在我正在努力让月球绕地球转,同时让地球绕太阳转。 谢谢你的帮助! 地球代码:Java 使月球绕地球旋转,java,jpanel,Java,Jpanel,我在创造一个简单的太阳系。地球绕着太阳转。现在我正在努力让月球绕地球转,同时让地球绕太阳转。 谢谢你的帮助! 地球代码: import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class Earth extends JPanel implements ActionListener{ Timer t=ne
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Earth extends JPanel implements ActionListener{
Timer t=new Timer(100,this);
private int x;
private int y;
private int height;
private int width;
private Color color;
double angle;
public Planetet(int x,int y,int height,int width,Color color) {
this.x=x;
this.y=y;
this.height=height;
this.width=width;
this.color=color;}
public void paint(Graphics g) {
//Extra Code for Screen clearing
g.setColor(getBackground());
boolean rotation=true;
int a, b;
if (rotation) {
int width = getWidth();
int height = getHeight();
a = (int) (Math.cos(angle) * (width / 3) + (width / 2));
b = (int) (Math.sin(angle) * (height / 3) + (height / 2));
} else {
a = getWidth()/2 - gjatsia/2;
b = getHeight()/2 - gjersia/2;
}
g.setColor(ngjyra);
g.fillOval(a, b, gjatsia, gjersia);
t.start();
}
public void actionPerformed(ActionEvent e) {
angle+=0.1/2;
if (angle>(2*Math.PI))
angle=0.1;
repaint();}
public static void main (String [] args) {
JFrame MainFrame=new JFrame();
MainFrame.getContentPane().setBackground( Color.black );
MainFrame.setSize(600,600);
Sun sun=new Sun(250,250,50,50,Color.YELLOW);
Earth earth=new Earth(400,270,20,20,Color.blue);
Moon moon=new Moon(400,270,10,10,Color.GRAY);
MainFrame.add(sun);
MainFrame.setVisible(true);
MainFrame.add(earth);
MainFrame.setVisible(true);
MainFrame.add(moon);
MainFrame.setVisible(true);
}
}
太阳代码:
import javax.swing.*;
import java.awt.*;
public class Sun extends JComponent{
private int x;
private int y;
private int height;
private int width;
private Color color;
double angle;
public Sun(int x,int y,int height,int width,Color color) {
this.x=x;
this.y=y;
this.height=height;
this.width=width;
this.color=color;}
public void paint(Graphics g) {
g.setColor(color);
g.fillOval(x, y, height, width);
}}
月球代码(需要更正):
这样想:一切都围绕着某个东西旋转——A围绕B旋转——B围绕C旋转——C围绕D旋转。。。如何在代码中表示这种关系?也许通过给每个物体一个它所旋转的物体的参照 此外,如果您有多个具有相同或非常相似行为的对象,则可以将此行为抽象到父(或抽象)类中,这样可以避免多次编写相同的代码
希望这能帮助您思考代码。这不是堆栈溢出的工作方式。我们不会帮你完成家庭作业。请参加,访问并阅读,学习如何有效地使用此网站。@JimGarrison不是我的家庭作业,但欢迎任何帮助。顺便说一句,谢谢你的建议!很抱歉,在最后一天发布了几个几乎相同的问题。这强烈暗示这是一个类分配,有几个人来这里找人为他们编写代码。@JimGarrison啊,好的。我只是想在如何连接月球和地球并围绕地球旋转的想法上得到帮助!!
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Moon extends JComponent implements ActionListener{
Timer t=new Timer(100,this);
private int x;
private int y;
private int height;
private int width;
private Color color;
double angle;
public Moon(int x,int y,int height,int width,Color color) {
this.x=x;
this.y=y;
this.height=height;
this.width=width;
this.color=color;}
public void paint(Graphics g) {
int width =getWidth();
int height=getHeight();
int a = (int) (Math.cos(angle) * (width/6) + (width/4));
int b = (int) (Math.sin(angle) * (height/6) + (height/4));
g.setColor(ngjyra);
g.fillOval(a, b, gjatsia, gjersia);
t.start();
}
public void actionPerformed(ActionEvent e) {
angle-=0.5/2;
if (angle>(2*Math.PI))
angle=0.0;
repaint();}}