用java做个风扇，求帮助

import java.awt.event.ActionEvent;

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import java.awt.event.ActionListener;

import javax.swing.*;

import javax.swing.event.ChangeEvent;

import java.awt.*;

import java.awt.geom.*;

import java.awt.event.*;

import java.applet.AudioClip;

public class Fan extends JFrame implements ActionListener{

static int time=1;

static int ti;

Timer time_1 = new Timer(100,this);

x1 x=new x1() ;

static TransPane jp;

JButton add=new JButton("加速");

JButton stop=new JButton("暂停/开始");

JButton low=new JButton("减速");

JButton dingshi=new JButton("定时1分钟");

JTextField TextIn = new JTextField("100");

JPanel p=new JPanel();

public Fan(){

super("旋销友宏转");

add(jp);

p.setLayout(new FlowLayout(FlowLayout.CENTER,30,30));

p.add(add);

p.add(stop);

p.add(low);

p.add(dingshi);

add(p,BorderLayout.SOUTH);

add.addActionListener(new ButtonHandler());

low.addActionListener(new ButtonHandler());

stop.addActionListener(new ButtonHandler());

dingshi.addActionListener(new ButtonHandler());

time_1=new Timer(1,x);

time_1.start();

}

class ButtonHandler implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(e.getSource()==add){

if(time=0)

time++;

else if(time告凳0)

time--;

}else if(e.getSource()==low){

if(time0)

time--;

else if(time亏册0)

time++;

}else if(e.getSource()==stop){

if(time!=0){

ti=time;

time=0;}

else

time=ti;

}

else if(e.getSource()==dingshi){

if(time!=1){

ti=time;

time=1;}

else time++;

}

}

}

public static void main(String[] args){

jp=new TransPane();

Fan tran=new Fan();

tran.setSize(250,300);

tran.setVisible(true);

tran.pack();

}

public void actionPerformed(ActionEvent arg0) {

}

class x1 implements ActionListener{

public void actionPerformed(ActionEvent e){

TransPane t1=new TransPane();

jp.i+=time;

jp.repaint();

}

}

}

class TransPane extends JPanel{

int i=0;

protected void paintComponent(Graphics g){

super.paintComponent(g);

Graphics2D g2d=(Graphics2D) g;

int xCenter=getWidth()/2;

int yCenter=getHeight()/2;

int radius=(int)(Math.min(getWidth(),getHeight()*0.4));

int x=xCenter-radius;

int y=yCenter-radius;

AffineTransform trans=new AffineTransform();

g2d.fillArc(x,y,2*radius,2*radius,i,30); g2d.setColor(Color.red);

g2d.fillArc(x,y,2*radius,2*radius,i+60,30); g2d.setColor(Color.yellow);

g2d.fillArc(x,y,2*radius,2*radius,i+120,30); g2d.setColor(Color.green);

g2d.fillArc(x,y,2*radius,2*radius,i+180,30); g2d.setColor(Color.gray);

g2d.fillArc(x,y,2*radius,2*radius,i+240,30); g2d.setColor(Color.blue);

g2d.fillArc(x,y,2*radius,2*radius,i+300,30); g2d.setColor(Color.black);

}

JAVA一道题，有个小问题。

这涉及到作用域的问题，还有成员变量和类变量的问题。你定义的SLOW应该用static修饰，并应该是虚或李public的。如public static final int SLOW = 1;这样定义就ok了。引用的时候，用Fan.SLOW引团判用此变量差迟

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