Question

import java.awt.*; //Container, GridLayout, *, or etc...
import javax.swing.*; //JFrame, JLabel, *, or etc...
import java.awt.event.*;
public class NumerologyEC extends JFrame
{
    private static final int Width = 400;
    private static final int Height = 100;

    private JLabel wordJL;
    private JTextField wordTF;

    private JButton calculateJB, exitJB;

    private CalculateButtonHandler cbHandler;
    private ExitButtonHandler ebHandler;

   public  NumerologyEC()
   {
       setTitle ("Numerology Extra Credit");
       wordJL = new JLabel ("Enter a word: ", SwingConstants.RIGHT);

       wordTF = new JTextField(10);

       calculateJB = new JButton ("Calculate");
       cbHandler = new CalculateButtonHandler();
       calculateJB.addActionListener (cbHandler);

       exitJB = new JButton ("Exit");
       ebHandler = new ExitButtonHandler();
       exitJB.addActionListener (ebHandler);

       Container pane = getContentPane();
       pane.setLayout (new GridLayout (2, 2));

       pane.add(wordJL);
       pane.add(wordTF);
       pane.add(calculateJB);
       pane.add(exitJB);

       setSize(Width, Height);
       setVisible (true);
       setDefaultCloseOperation (EXIT_ON_CLOSE);
    }

      private class CalculateButtonHandler  implements ActionListener
    {
        public void actionPerformed (ActionListener e)
        {
            String word;

            word = String.parseString (wordTF.getText());
        }
    }

    private class ExitButtonHandler implements ActionListener
    {
        public void actionPerfromed (ActionEvent e)
        {
          System.exit (0);  
        }
    }

   public static void main (String[] args)
   {
    NumerologyEC rectObject = new NumerologyEC();
    }


}

我一直在“私有类CalculateButtonHandler实现ACtionListener”上出现错误

我缺少什么？

Answer 1

小心，ExitButtonHandler中的方法是错误的：

public void actionPerfromed (ActionEvent e)
{
  System.exit (0);  
}

正确的拼写是：

actionPerformed(ActionEvent e)
{
  System.exit(0);
}

第二：CalculateButtonHandler中的方法是错误的，正确的方法是

public void actionPerfromed (ActionEvent e)
{

}

不是

public void actionPerfromed (ActionListener e)
{

}

也是代码

word = String.parseString (wordTF.getText());

错误，String类没有parseString()方法。我想你想从输入TextArea获取输入并将其转换为String，为什么不使用word=wordTF.getText()，因为wordTF.getText()是一个String。

我的程序出错了

1 个答案: