我得到一个错误:构造函数类RedListener中的RedListener不能应用于给定的类型; jrbRed.addActionListener(new RedListener(canvas,canvas2));我的actionListener调用有什么问题
我收到每个听众一个。该程序应该是一个红绿灯,当我点击一个点亮“点亮”的单选按钮时。如果没有,那么点击它只是应该在颜色被概括
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
public class Lab4Frame extends JFrame {
//public boolean red, yellow, green;
Lab4Frame(){
this.setLayout(new BorderLayout());
setTitle("Lab 4 - Application #1");
Lab4Panel p = new Lab4Panel();
Lab4RadioButtonPanel p2 = new Lab4RadioButtonPanel();
add(p, BorderLayout.CENTER);
add(p2, BorderLayout.SOUTH);
}
public static void main(String[] args){
Lab4Frame frame = new Lab4Frame();
frame.setTitle("Lab4 Application # 1");
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(600, 600);
frame.setVisible(true);
}
}
class Lab4RadioButtonPanel extends JPanel {
Lab4Panel canvas = new Lab4Panel();
Lab4RadioButtonPanel canvas2 = new Lab4RadioButtonPanel();
public Lab4RadioButtonPanel() {
boolean red, green, yellow;
this.setLayout(new FlowLayout());
JRadioButton jrbRed = new JRadioButton("Red", true);
JRadioButton jrbYellow = new JRadioButton("Yellow");
JRadioButton jrbGreen = new JRadioButton("Green");
this.setBorder(BorderFactory.createLineBorder(Color.black));
ButtonGroup group = new ButtonGroup();
group.add(jrbRed);
group.add(jrbYellow);
group.add(jrbGreen);
this.add(jrbRed);
this.add(jrbYellow);
this.add(jrbGreen);
jrbRed.addActionListener(new RedListener(canvas, canvas2));
jrbYellow.addActionListener(new YellowListener(canvas, canvas2));
jrbGreen.addActionListener(new GreenListener(canvas, canvas2));
}
}
class Lab4Panel extends JPanel{
public Lab4Panel(){}
boolean red, green, yellow;
int radius = 5;
int x = -1;
int y = -1;
public void setRed(){
red = true;
repaint();
}
protected void paintComponent(Graphics g){
if (x<0 || y<0) {
x = getWidth()/2 - radius;
y = getHeight()/2 - radius;
}
super.paintComponent(g);
g.drawRect(x - 10,y - 90, 40, 120);
g.drawOval(x,y - 80, 4 * radius, 4 * radius);
g.drawOval(x,y - 40, 4 * radius, 4 * radius);
g.drawOval(x,y, 4 * radius, 4 * radius);
g.drawRect(x - 5,y - 90, 40, 120);
if(red){
g.setColor(Color.RED);
g.fillOval(x,y - 80, 4 * radius, 4 * radius);
repaint();
}
else if (yellow){
g.setColor(Color.YELLOW);
g.fillOval(x,y - 40, 4 * radius, 4 * radius);
repaint();
}
if(green){
g.setColor(Color.GREEN);
g.fillOval(x,y, 4 * radius, 4 * radius);
repaint();
}
}
}
class RedListener implements ActionListener{
private Lab4RadioButtonPanel canvas;
private Lab4Panel canvas2;
RedListener(Lab4RadioButtonPanel canvas, Lab4Panel canvas2) {
this.canvas = canvas;
}
public void actionPerformed(ActionEvent e){
canvas2.setRed();
}
}
class YellowListener implements ActionListener{
private Lab4RadioButtonPanel canvas;
private Lab4Panel canvas2;
YellowListener(Lab4RadioButtonPanel canvas, Lab4Panel canvas2) {
this.canvas = canvas;
}
public void actionPerformed(ActionEvent e){
canvas2.setRed();
}
}
class GreenListener implements ActionListener{
private Lab4RadioButtonPanel canvas;
private Lab4Panel canvas2;
GreenListener(Lab4RadioButtonPanel canvas, Lab4Panel canvas2) {
this.canvas = canvas;
}
public void actionPerformed(ActionEvent e){
canvas2.setRed();
}
}
谢谢你的帮助,但我仍然是一个学生学习这个东西的学生。我一直在寻找20分钟的textpad编译器试图找出我做错了什么。 – Robert 2012-02-14 02:29:52
@ user512915,熟悉更复杂的专业IDE(例如Eclipse,NetBeans等)。这些编译器将这些20分钟的无意义调试减少到几个纳秒。 ;] – mre 2012-02-14 02:31:27
我们不允许在课堂上使用IDE。我忘了把它放在顶部抱歉。 – Robert 2012-02-14 02:42:47