我正在制作一个模拟时钟,我遇到了一个我无法解决的问题。Java - 类之间的通信 - 问题
我有三个类:主,时钟,指针。 主要只是创建时钟,并启动一切。 时钟管理时钟如何工作和绘制。 指针定义了指针的功能。
时钟创建三个不同的图像和速度指针。 在指针类中,定时器以参数速度启动。
根据速度(即它是什么指针),指针角度将增加。 时钟获取绘画时的角度。
我的问题是,我不能让指针对象告诉时钟何时执行一个操作,以便它可以更新和重新绘制?怎么解决?我不能从指针创建一个新的时钟对象,因为我得到了大量的错误。
请帮忙!
Here's的代码:(忽略在时钟周期()方法)
主:
import javax.swing.JFrame;
public class Main extends JFrame {
public Main(){
add(new Clock());
setTitle("Klocka");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(400,400);
setVisible(true);
setLocationRelativeTo(null);
setResizable(false);
}
public static void main(String[] args){
new Main();
}
}
时钟:
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.JPanel;
public class Clock extends JPanel {
private Image back;
private int angle = 1;
private int a = 1;
private int b = 0;
public Pointer pPink;
public Pointer pWeird;
public Pointer pRose;
public Clock(){
pPink = new Pointer(3600,"pink.jpg");
pWeird = new Pointer(60,"weird.jpg");
pRose = new Pointer(1,"rose.jpg");
}
public void paint(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
if (pPink.img != null){
g2d.rotate(pPink.angle*(3.1415/180));
g2d.drawImage(pPink.getImg(), 200 ,60, this);
}
if (pWeird.img != null){
g.drawImage(pWeird.getImg(), 250, 200, null);
}
if (pRose.img != null){
g.drawImage(pRose.getImg(), 300, 200, null);
}
ImageIcon i = new ImageIcon(this.getClass().getResource("wheel.png"));
back = i.getImage();
g.drawImage(back,50,50, null);
g.dispose();
cycle();
}
public void cycle(){ // a terrible try to solve the problem...
if (angle != pPink.angle){
repaint();
System.out.println(angle);
System.out.println(pPink.angle);
System.out.println("");
angle = pPink.angle;
}
}
}
指针:
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.Timer;
public class Pointer implements ActionListener {
public int angle = 0;
public int speed;
public String fileName;
public Image img;
Timer timer;
public Pointer(int speed, String fileName) {
this.speed = speed * 1000 ;
timer = new Timer(this.speed, this);
timer.start();
this.fileName = fileName;
ImageIcon ii = new ImageIcon(getClass().getResource(this.fileName));
img = ii.getImage();
}
public Image getImg(){
return img;
}
public void actionPerformed(ActionEvent e) {
angle+= 6;
System.out.println("angle increased");
}
}
动作在哪里产生? – DJClayworth