小编use*_*750的帖子

我是Java的新手,我有一个问题,当我尝试创建一个公共/私有变量时示例: private int varName; Eclipse给了我一个错误: Illegal modifier for parameter count; only final is permitted

好的，所以我是 Java 新手，我正在尝试制作我的第一个程序，但收到此消息，我似乎无法修复：

The method format(String, Object[]) in the type String is not applicable for the arguments (String, int, int).

这是代码：

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class Gui extends JFrame{
    private JPanel GamePanel;
    private JLabel statusbar;

    public Gui(){
        super("Title");
        GamePanel = new JPanel();
        GamePanel.setBackground(Color.WHITE);
        add(GamePanel, BorderLayout.CENTER);

        statusbar = new JLabel("default");
        add(statusbar, BorderLayout.SOUTH);

        HandlerClass handler = new HandlerClass();
        GamePanel.addMouseListener(handler);
    }

    class HandlerClass implements MouseListener{
        public void mouseEntered(MouseEvent event){
            //here is where the problem is!
            statusbar.setText(String.format("%d, %d", event.getX(), event.getY());
        } …