Question

the type must implement the inherited abstract method ActionListener.actionPerformed(ActionEvent)

package JPanel;
import javax.swing.*;
import java.awt.event.*;

public class test5 extends JFrame implements ActionListener
{
JButton jb=new JButton();
int i=0;

public test5()
{
this.setTitle("创建按钮");
jb.setText("按钮按了0次");
jb.setMnemonic('a');
this.add(jb);
jb.addActionListener(this);
this.setBounds(300,250,300,200);
this.setVisible(true);

public void avtionPerformed(ActionEvent e)
{
this.jb.setText("按钮按了"+(++i)+"次");
}

public static void main(String args[])
{
test5 t=new test5();
}

}

写这个的时候在test5处报错the type must implement the inherited abstract method ActionListener.actionPerformed(ActionEvent)
求指导

Answer 1

public void avtionPerformed(ActionEvent e)
{
this.jb.setText("按钮按了"+(++i)+"次");
} 把这个方法拿出去

-------------------------------------------

package JPanel;
import javax.swing.*;
import java.awt.event.*;

public class test5 extends JFrame implements ActionListener
{
JButton jb=new JButton();
int i=0;

public test5()
{
this.setTitle("创建按钮");
jb.setText("按钮按了0次");
jb.setMnemonic('a');
this.add(jb);
jb.addActionListener(this);
this.setBounds(300,250,300,200);
this.setVisible(true);
}

public static void main(String args[])
{
test5 t=new test5();
}

public void avtionPerformed(ActionEvent e)
{
this.jb.setText("按钮按了"+(++i)+"次");
}

}

追问

你好 我按你说的把这个方法拿出去了还是存在一样错误
如果把这个方法拿出去按照你写的这样，那会不会不执行这个方法？

追答

怎么可能，你试下再说；你这个方法名写错了
public void avtionPerformed(ActionEvent e)
{
this.jb.setText("按钮按了"+(++i)+"次");
}
改成：
public void actionPerformed(ActionEvent e) {
this.jb.setText("按钮按了"+(++i)+"次");
}