Question

java测试鼠标点击速度的程序

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.Timer;
import java.util.*;

public class Button
{
public static void main(String[] args)
{

EventQueue.invokeLater(new Runnable()
{
public void run()
{
ActionListener listener = new TimePrinter();
Timer t = new Timer(5000, listener);
ButtonFrame frame = new ButtonFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setResizable(false);
}
});
}
}

class ButtonFrame extends JFrame
{

int con = 0;
public int getcon()
{
return con;
}
public ButtonFrame()
{
ActionListener listener = new TimePrinter();
final Timer t = new Timer(5000, listener);
getContentPane().setLayout(null);
setTitle("Button");
setSize(DEFAULT_WIDTH, DEFAULT_WIDTH);
JButton PButton = new JButton("Press me!");
txt = new JTextField();
txt.setBounds(125, 150, 50, 20);
getContentPane().add(txt);
getContentPane().add(PButton);
JButton QButton = new JButton("Clear");
QButton.setBounds(110,180,80,50);
getContentPane().add(QButton);
PButton.setBounds(70,75,160,40);
PButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{

t.start();
con++;
txt.setText(String.valueOf(con));
}
});

QButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
con = 0;
txt.setText(String.valueOf(con));
}
});

}

private JPanel buttonPanel;
private JTextField txt;
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;

}

class TimePrinter implements ActionListener
{
public void actionPerformed(ActionEvent event)
{

System.out.println("APM is" + con*12);

}
}

最后的con变量访问有问题。另外怎么弹出窗口显示con*12，而非print。

Answer 1

我用你的代码，System.out.println("APM is" + con*12);访问不了。 ButtonFrame 类中的 con

而且也没有弹出窗口。

追问

把con*12去掉就可以弹窗了，但是这样不能输出测速结果了

追答

是以出窗口，
点按钮，文本框里的数会变。
你的问题是？

追问

我希望这样，Timer所计算的时间5秒到了后，输出con*12结果，就是用五秒内鼠标点击次数乘以12，获得一分钟内点击次数。但是不同class不能互相访问变量，怎么解决

追答

给你改了一下,方法有很多,
可以是象我这样,将当前类实现ActionListener.
或是你的TimePrinter 当作是内部类.
也可以是传类实例给TimePrinter
你看一下下边的吧.
---------------------------------------------------------
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.Timer;

public class Button {
public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {
public void run() {
ButtonFrame frame = new ButtonFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setResizable(false);
}
});
}
}

class ButtonFrame extends JFrame implements ActionListener {

private JTextField txt;
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;
int con = 0;

public ButtonFrame() {
Timer t = new Timer(5000, this);
t.start();
getContentPane().setLayout(null);
setTitle("Button");
setSize(DEFAULT_WIDTH, DEFAULT_WIDTH);
JButton PButton = new JButton("Press me!");
txt = new JTextField();
txt.setBounds(125, 150, 50, 20);
getContentPane().add(txt);
getContentPane().add(PButton);
JButton QButton = new JButton("Clear");
QButton.setBounds(110, 180, 80, 50);
getContentPane().add(QButton);
PButton.setBounds(70, 75, 160, 40);
PButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
con++;
txt.setText(String.valueOf(con));
}
});
QButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
con = 0;
txt.setText(String.valueOf(con));
}
});
}

public void actionPerformed(ActionEvent event) {

System.out.println("APM is" + con * 12);

}
}