我在编译以下代码时遇到问题 - 我得到了两个错误：

C:\java>javac Project2.java
Project2.java:8: error: Project2 is not abstract and does not override abstract
method actionPerformed(ActionEvent) in ActionListener
public class Project2 extends Applet implements ActionListener
       ^
Project2.java:19: error: <anonymous Project2$1> is not abstract and does not ove
rride abstract method actionPerformed(ActionEvent) in ActionListener
        ActionListener getNewValues = new ActionListener() {
                                                           ^
2 errors

该计划的目的是模拟乌龟和野兔之间的竞赛。随机数发生器用于确定乌龟和野兔在任何给定转弯处可以向前或向后移动多少次。

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.*;
import java.awt.Color;



public class Project2 extends Applet
{
int squaret = 1;
int squareh = 1; //initial location of tortoise and hare
int move;
String tmessage;
String hmessage;

Timer timer;

public void init()
{

    timer = new Timer(1000, getNewValues); 
    timer.addActionListener(getNewValues);


}


ActionListener getNewValues = new ActionListener() {

    public void actionPerformed(ActionEvent e) 
    {
        repaint();
    }
};

public void paint (Graphics g) 
{
    move = (int)(Math.random() * 10) + 1;

    if (move > 8)
    {   
        squaret -= 6;
        tmessage = "Tortoise slips!";

        if (squaret < 1)
            squaret = 1;

    }       
    else if (move > 6)
    {
        squaret += 1;
        tmessage = "Tortoise plods slowly along.";
        if (squaret > 49)
            squaret = 50;

        squareh -=2;
        hmessage = "Hare slips slightly.";
        if (squareh < 1)
            squareh = 1;

    }

    else if (move > 5)
    {
        squaret += 1;
        tmessage = "Tortoise plods slowly along.";
        if (squaret > 49)
            squaret = 50;

        squareh -=12;
        hmessage = "Hare makes a big slip.";
        if (squareh < 1)
            squareh = 1;

    }

    else if (move > 2)
    {
        squaret += 3;
        tmessage = "Tortoise plods along quickly.";
        if (squaret > 49)
            squaret = 50;

        squareh += 1;
        hmessage = "Hare makes a small hop.";
        if (squareh > 49)
            squareh = 50;

    }
    else 
    {
        squaret += 3;
        tmessage = "Tortoise plods along quickly.";
        if (squaret > 49)
            squaret = 50;

        squareh += 9;
        hmessage = "Hare makes a big hop.";
        if (squareh > 49)
            squareh = 50;
    }

    g.drawString("Start (Square 1)", 0, 70);
    g.drawString("Finish (Square 50)", 900, 70);


    //determine positions for each area
    //each box is ten wide and 150 tall

    final int WIDTH_OF_OVAL = 4;
    final int HEIGHT_OF_OVAL = 4;
    final int WIDTH_OF_SQUARE = 20;
    final int HEIGHT_OF_SQUARE = 20;
    g.setColor(Color.GREEN);
    g.fillOval(((WIDTH_OF_SQUARE - WIDTH_OF_OVAL) / 2) + WIDTH_OF_SQUARE * (squaret - 1), ((HEIGHT_OF_SQUARE - HEIGHT_OF_OVAL) / 2), WIDTH_OF_OVAL, HEIGHT_OF_OVAL);

    g.setColor(Color.YELLOW);
    g.fillOval(((WIDTH_OF_SQUARE - WIDTH_OF_OVAL) / 2) + WIDTH_OF_SQUARE * (squaret - 1), ((HEIGHT_OF_SQUARE - HEIGHT_OF_OVAL) / 2) + HEIGHT_OF_SQUARE, WIDTH_OF_OVAL, HEIGHT_OF_OVAL);

    //show messages
    g.setColor(Color.BLACK);
    g.drawString(tmessage, 10, 100);
    g.drawString(hmessage, 10, 120);

    g.drawLine(0, HEIGHT_OF_SQUARE, WIDTH_OF_SQUARE * 50, HEIGHT_OF_SQUARE); //draw horizontal middle line

    for (int i = 0; i < 50; i++) //draw vertical lines
    {
        int width = (i + 1) * WIDTH_OF_SQUARE;

        g.drawLine(width, 0, width, HEIGHT_OF_SQUARE * 2);
    }

    if (squaret > 49 && squareh > 49)
    {
        g.drawString("Tie!", 500, 60);
        timer.stop();
    }   
    else if (squaret > 49)
    {
        g.drawString("Turtle wins!", 500, 60);
        timer.stop();
    }
    else if (squareh > 49)
    {
        g.drawString("Hare wins!", 500, 60);
        timer.stop();
    }   
    else
    {

    }   

    update(g);

}

public static void main(String[] args) 
{

    Project2 panel = new Project2();
    JFrame application = new JFrame();

    application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    application.add(panel);
    application.setSize(2600, 300);
    application.setVisible(true);

}
}

我有方法actionPerformed所以我不知道为什么我得到了我得到的错误。任何反馈或帮助将不胜感激！

Answer 1

actionPerformed中的拼写错误，您错过了 r 。改为：

public void actionPerformed(ActionEvent e)  
{
     repaint();
}

尽管有方法，但不会覆盖抽象方法actionPerformed（ActionEvent）错误

我在编译以下代码时遇到问题 - 我得到了两个错误：

1 个答案: