初学者在学GUI 请教小弟我的程序错哪了
日期：2014-05-20 浏览次数：20956 次
菜鸟在学GUI 请问我的程序哪里错了
Its an exercise from thinking java.
pls tell me whats wrong with the code as follow.
If someone could help me fix it, i will be really appreciated it.
thx.
/* output
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
The method run(ex05, int, int) is undefined for the type ex05
at ex05.main(ex05.java:31)[that is {run(new ex05(), 400, 200);}]
thx guys!
------解决方案--------------------
很简单啊，你声明run方法的时候写的形式参数第一个是JFrame类，但是传参的时候实际参数是ex05类的，虽然它是JFrame的子类，但是肯定类型不匹配，你可以这样
Its an exercise from thinking java.
pls tell me whats wrong with the code as follow.
If someone could help me fix it, i will be really appreciated it.
thx.
- Java code
import javax.swing.*;
import java.awt.*;
import static net.mindview.util.SwingConsole.*;
public class Button1 extends JFrame{
/**
* @param args
*/
private JButton b1 = new JButton("Button 1"),
b2 = new JButton("Button 2");
public Button1(){
setLayout(new FlowLayout());
add(b1);
add(b2);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
run(new Button1(),400,600);
}
}
- Java code
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import net.mindview.util.SwingConsole;
public class ex05 extends JFrame {
/**
* @param args
*/
private JButton b1 = new JButton("Button 1"),
b2 = new JButton("Button 2"),
b3 = new JButton("Button 3");
private JTextField txt = new JTextField(10);
private ActionListener bl = new ActionListener(){
public void actionPerformed(ActionEvent e){
String name = ((JButton)e.getSource()).getText();
txt.setText(name);
}
};
public ex05(){
b1.addActionListener(bl);
b2.addActionListener(bl);
b3.addActionListener(bl);
setLayout(new FlowLayout());
add(b1);
add(b2);
add(b3);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
run(new ex05(), 400, 200);
}
}
/* output
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
The method run(ex05, int, int) is undefined for the type ex05
at ex05.main(ex05.java:31)[that is {run(new ex05(), 400, 200);}]
thx guys!
------解决方案--------------------
很简单啊，你声明run方法的时候写的形式参数第一个是JFrame类，但是传参的时候实际参数是ex05类的，虽然它是JFrame的子类，但是肯定类型不匹配，你可以这样
- Java code
JFrame jf=new ex05()；
run(jf,400, 200);
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