方法调用不起作用

时间:2012-03-09 11:30:08

标签: java swing methods

Game.java调用board.java中存在的函数getLabel()。当我运行Game.java时,我在终端中收到错误“找不到符号方法getLabel()”。我无法纠正它。

Game.java

import java.awt.*;
import javax.swing.*;
import javax.swing.JLabel;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

public class Game {

    private board b;
    private bishop bis1;
    private JLabel q;

    public static void main(String[] args) {
        Game f = new Game();
        f.start();
    }

    public void start() {
        b = new board();
        bis1 = new bishop();
        bis1.setLocation(0, 0);
        ImageIcon m = bis1.getImage();
        q = b.getLabel();

        q.addMouseListener(new Mouselist());
        b.squares[0][0].add(q);
    }

    class Mouselist implements MouseListener {

        public void mouseClicked(MouseEvent e) {
            //k.setIcon(null);
            b.squares[1][1].add(new JLabel(new ImageIcon("rook.png")));
        }

        // mouse entered the JLabel increment count and display it
        public void mouseEntered(MouseEvent e) {
            b.squares[1][1].add(new JLabel(new ImageIcon("rook.png")));
        }

        public void mouseExited(MouseEvent e) {
            b.squares[1][2].add(new JLabel(new ImageIcon("rook.png")));
        }

        // mouse was presssed (cliked and released)
        // increment counter and display it
        public void mousePressed(MouseEvent e) {
            b.squares[1][1].add(new JLabel(new ImageIcon("rook.png")));

        }

        public void mouseReleased(MouseEvent e) {
            b.squares[1][1].add(new JLabel(new ImageIcon("rook.png")));
        }
    }
}

board.java

import javax.swing.*;
import java.awt.*;
import javax.swing.JLabel;

public class board {

    public JFrame frame;
    public JPanel squares[][] = new JPanel[3][3];
    private JLabel sqk = new JLabel(new ImageIcon("knight.png"));

    public board() {
        frame = new JFrame("Simplified Chess");
        frame.setSize(1200, 800);
        frame.setLayout(new GridLayout(2, 3));

        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 3; j++) {
                squares[i][j] = new JPanel();

                if ((i + j) % 2 == 0) {
                    squares[i][j].setBackground(Color.black);
                } else {
                    squares[i][j].setBackground(Color.white);
                }
                frame.add(squares[i][j]);
            }
        }

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

    public JLabel getLabel() {
        return sqk;
    }
}

这里可能有什么问题?

2 个答案:

答案 0 :(得分:3)

很可能您刚刚添加了getLabel()方法,但尚未重新编译board.java

答案 1 :(得分:0)

我将你的代码用于board.java和Game.java并将其加载到我的IDE中。我在第24行没有得到错误(q = b.getLabel())。 (我确实得到了一些编译错误,因为你没有提供bishop.java,但这与你的问题无关。)

第24行是您收到错误的地方吗?如果是这样,你能否给我发送3个实际的.java文件。

顺便说一下,尽管与你的问题无关,如上所述,大写班级名称(例如Board和Bishop)是非常标准的做法,我强烈建议你这样做。它将使其他Java程序员更容易阅读您的代码。