Question

过去半小时我一直在为这个错误烦恼。 JPanel cannot be resolved to a type但是，我已经导入了javax.swing.JPanel;，我看不出为什么会造成这种情况的另一个原因。我在好的或其他问题上找不到任何帮助。然而，问题的有趣之处在于，所有变量都来自swing包。我已经尝试重新添加JRE System Library（我正在使用eclipse），但这没有任何帮助。这是我正在使用的一些代码;

import javax.swing.JFrame;
import javax.swing.JLayeredPane;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JSeparator;

public class Workshop {
    private JFrame window = new JFrame("Meejo WorkShop");
    private JLayeredPane lpane = new JLayeredPane();
    private JPanel panelBg = new JPanel();
    private JPanel panelGame = new JPanel();
    private JPanel panelProp = new JPanel();
    private JPanel panelWork = new JPanel();

是问题的一个例子。所有变量都会错误[Var Type] Cannot be resolved to a type超过rivate和= ne任何想法，为什么？如果是这样，我该如何解决？感谢。

编辑：完整的代码是;

package mj.workshop;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JLayeredPane;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JSeparator;

public class Workshop {
    private final JFrame window = new JFrame("Meejo WorkShop");
    private final JLayeredPane lpane = new JLayeredPane();
    private final JPanel panelBg = new JPanel();
    private final JPanel panelGame = new JPanel();
    private final JPanel panelProp = new JPanel();
    private final JPanel panelWork = new JPanel();

    private final JMenuBar windowMenu = new JMenuBar();
    private final JMenu menuFile = new JMenu("File");
    private final JMenu menuEdit = new JMenu("Edit");
    private final JMenu menuHelp = new JMenu("Help");
    // private JMenu menuTest = new JMenu("Test");
    private final JMenuItem menuFileNew = new JMenuItem("New");
    private final JMenuItem menuFileSave = new JMenuItem("Save");
    private final JMenuItem menuFileSaveAs = new JMenuItem("Save As");
    private final JMenuItem menuFileExit = new JMenuItem("Exit");
    private final JMenuItem menuEditOptions = new JMenuItem("Options");
    // private JMenuItem menuEditRedo = new JMenuItem("Redo");
    // private JMenuItem menuEditUndo = new JMenuItem("Undo");
    // private JMenuItem menuEditCopy = new JMenuItem("Copy");
    // private JMenuItem menuEditCut = new JMenuItem("Cut");
    // private JMenuItem menuEditPaste = new JMenuItem("Paste");
    // private JMenuItem menuEditInsert_Comment = new
    // JMenuItem("Insert Comment");
    private final JMenuItem menuHelpSupport = new JMenuItem("Support");
    private final JMenuItem menuHelpAbout = new JMenuItem("About");
    private final JMenuItem menuHelpTips = new JMenuItem("Tips");
    private final JPopupMenu menuHelpTipsPopUp = new JPopupMenu("Tips");
    // private JMenuItem menuTestStart = new JMenuItem("Start");
    // private JMenuItem menuTestPause = new JMenuItem("Pause");
    // private JMenuItem menuTestStop = new JMenuItem("Stop");

    int xSize, ySize;

    public Workshop() {
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Toolkit tk = Toolkit.getDefaultToolkit();
        xSize = ((int) tk.getScreenSize().getWidth());
        ySize = ((int) tk.getScreenSize().getHeight());
        window.setSize(xSize, ySize);
        xSize = window.getWidth();
        ySize = window.getHeight();
        Image icon = Toolkit.getDefaultToolkit().getImage("images/icon.png");
        window.setIconImage(icon);
        window.setBackground(Color.WHITE);
        window.setMinimumSize(new Dimension(600, 450));

        setUpMenu();

        Thread mainThread = new Thread();
        mainThread.start();

        window.setPreferredSize(new Dimension(xSize, ySize));
        window.setLayout(new BorderLayout());
        window.add(lpane, BorderLayout.CENTER);
        lpane.setBounds(0, 0, 600, 400);
        panelBg.setBackground(Color.WHITE);
        panelBg.setBounds(0, 0, xSize, ySize);
        panelBg.setOpaque(true);
        panelProp.setBackground(new Color(235, 235, 235));
        panelProp.setBounds(0, (int) (Math.round(ySize * 0.20)),
                (int) (Math.round(xSize * 0.175)),
                (int) (Math.round(ySize * 0.80)));
        panelProp.setOpaque(true);
        panelWork.setBackground(new Color(235, 235, 235));
        panelWork.setBounds((int) (Math.round(xSize * 0.825)),
                (int) (Math.round(ySize * 0.20)),
                (int) (Math.round(xSize * 0.175)),
                (int) (Math.round(ySize * 0.80)));
        panelWork.setOpaque(true);
        panelGame.setBackground(Color.BLUE);
        panelGame.setBounds((int) (Math.round(xSize * 0.175)),
                (int) (Math.round(ySize * 0.20)),
                (int) (Math.round(xSize * 0.65)),
                (int) (Math.round(ySize * 0.80)));
        panelGame.setOpaque(true);
        lpane.add(panelBg, new Integer(0), 0);
        lpane.add(panelGame, new Integer(1), 0);
        lpane.add(panelProp, new Integer(1), 0);
        lpane.add(panelWork, new Integer(1), 0);
        window.pack();
        window.setVisible(true);

        while (true) {
            windowrefresh();
        }

    }

    public void windowrefresh() {
        try {
            Thread.sleep(1000);
            xSize = window.getWidth();
            ySize = window.getHeight();
            panelProp.setBounds(0, (int) (Math.round(ySize * 0.20)),
                    (int) (Math.round(xSize * 0.175)),
                    (int) (Math.round(ySize * 0.80)));
            panelWork.setBounds((int) (Math.round(xSize * 0.825)),
                    (int) (Math.round(ySize * 0.20)),
                    (int) (Math.round(xSize * 0.175)),
                    (int) (Math.round(ySize * 0.80)));
            panelGame.setBounds((int) (Math.round(xSize * 0.175)),
                    (int) (Math.round(ySize * 0.20)),
                    (int) (Math.round(xSize * 0.65)),
                    (int) (Math.round(ySize * 0.80)));
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    private void setUpMenu() {
        menuFileSave.setEnabled(false);
        menuFileSaveAs.setEnabled(false);
        menuFile.add(menuFileNew);
        menuFile.add(menuFileSave);
        menuFile.add(menuFileSaveAs);
        menuFile.add(new JSeparator());
        menuFile.add(menuFileExit);
        menuEdit.add(menuEditOptions);
        // menuEdit.add(menuEditRedo);
        // menuEdit.add(menuEditUndo);
        // menuEdit.add(menuEditCopy);
        // menuEdit.add(menuEditCut);
        // menuEdit.add(menuEditPaste);
        // menuEdit.add(menuEditInsert_Comment);
        menuHelp.add(menuHelpSupport);
        menuHelp.add(menuHelpAbout);
        menuHelp.add(new JSeparator());
        menuHelp.add(menuHelpTips);
        // windowTest.add(menuTestStart);
        // windowTest.add(menuTestPause);
        // windowTest.add(menuTestStop);
        windowMenu.add(menuFile);
        windowMenu.add(menuEdit);
        windowMenu.add(menuHelp);
        // windowMenu.add(menuTest);
        windowMenu.setFont(new Font("Arial", Font.PLAIN, 12));
        window.setJMenuBar(windowMenu);

        menuHelpTips.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent evt) {
                if (evt.isPopupTrigger()) {
                    menuFileSave.setEnabled(true);
                    menuFileSaveAs.setEnabled(true);
                }
            }

            @Override
            public void mouseReleased(MouseEvent evt) {
                if (evt.isPopupTrigger()) {
                    menuFileSave.setEnabled(true);
                    menuFileSaveAs.setEnabled(true);
                }
            }
        });
    }
}

Answer 1

正如Brian的评论所说，这只是一个编码问题。更改为UTF-8会在重新执行所有导入后修复所有错误。

Java - [Var Type]无法解析

1 个答案: