这句话怎么错了，大家帮忙看看吧

dragonwan1113 2008-10-09 12:37:49

import java.awt.*;
import java.awt.event.*;
public class Chatclient extends Frame {
TextField tf = new TextField ();
TextArea ta = new TextArea ();

public static void main(String[] args) {

new Chatclient ().inframe();
（提示这里有错误）tf.addActionListener(new Tflistener());

}
public void inframe() {
setLocation(400,400);
setSize(400,500);
this.add(tf,BorderLayout.SOUTH);
add(ta,BorderLayout.NORTH);
pack();
addWindowListener (new Mywinl());

setVisible(true);
}
private class Mywinl extends WindowAdapter {
public void windowClosing(WindowEvent e){
System.exit(0);
}

}
private class Tflistener implements ActionListener {

public void actionPerformed(ActionEvent e) {
String s = tf.getText();
ta.setText(s);
tf.setText("");

}

}
}

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喜欢踢足球的老罗 2008-10-11

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多多去看一下类成员呀，变量的访问规则先吧..

liujiaqwer 2008-10-11

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沙发正解

nine_suns99 2008-10-11

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改了两行



import java.awt.*;

import java.awt.event.*;



public class Chatclient extends Frame

{

    static TextField tf = new TextField();

    

    TextArea ta = new TextArea();

    

    public static void main(String[] args)

    {

         

        Chatclient chatclient = new Chatclient();

        chatclient.inframe();

        tf.addActionListener(chatclient.new Tflistener());

    }

    

    public void inframe()

    {

        setLocation(400, 400);

        setSize(400, 500);

        this.add(tf, BorderLayout.SOUTH);

        add(ta, BorderLayout.NORTH);

        pack();

        addWindowListener(new Mywinl());

        

        setVisible(true);

    }

    

    private class Mywinl extends WindowAdapter

    {

        public void windowClosing(WindowEvent e)

        {

            System.exit(0);

        }

        

    }

    

    private class Tflistener implements ActionListener

    {

        

        public void actionPerformed(ActionEvent e)

        {

            String s = tf.getText();

            ta.setText(s);

            tf.setText("");

            

        }

        

    }

}

CandyOfJAVA 2008-10-10

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import java.awt.*;
import java.awt.event.*;
public class Chatclient extends Frame {
TextField tf = new TextField ();
TextArea ta = new TextArea ();

public static void main(String[] args) {

new Chatclient ().inframe();

}
public void inframe() {
setLocation(400,400);
setSize(400,500);
tf.addActionListener(new Tflistener());//错误就是3楼所说的，你只要把监听添到inframe方法中来就行了
this.add(tf,BorderLayout.SOUTH);
add(ta,BorderLayout.NORTH);
pack();
addWindowListener (new Mywinl());

setVisible(true);
}
private class Mywinl extends WindowAdapter {
public void windowClosing(WindowEvent e){
System.exit(0);
}

}
private class Tflistener implements ActionListener {

public void actionPerformed(ActionEvent e) {
String s = tf.getText();
ta.setText(s);
tf.setText("");

}

}
}

qinchuan32 2008-10-10

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public static void main(String[] args) {

new Chatclient().inframe();
tf.addActionListener(new Tflistener());

}//main方法为静态方法，tf在这里不为静态变量。静态方法不能对非静态变量进行引用。
此外，class Tflistener应写到class Chatclient外面去。
//
import java.awt.*;
import java.awt.event.*;

public class Chatclient extends Frame {
static TextField tf = new TextField();

TextArea ta = new TextArea();

public static void main(String[] args) {

new Chatclient().inframe();
tf.addActionListener(new Tflistener());

}

public void inframe() {
setLocation(400, 400);
setSize(400, 500);
this.add(tf, BorderLayout.SOUTH);
add(ta, BorderLayout.NORTH);
pack();
addWindowListener(new Mywinl());

setVisible(true);
}

private class Mywinl extends WindowAdapter {
public void windowClosing(WindowEvent e) {
System.exit(0);
}

}

}
class Tflistener implements ActionListener {
TextField tf = new TextField();
TextArea ta = new TextArea();
public void actionPerformed(ActionEvent e) {
String s = tf.getText();
ta.setText(s);
tf.setText("");

}

}

dragonwan1113 2008-10-09