JMenuItems很糟糕

时间:2014-12-17 12:40:03

标签: java jframe jmenuitem jmenubar

我已经构建了一个UI但是当我尝试选择MenuBar的选项时,它被绘制得很糟糕。

这是我的主要内容 Launcher.java

public class Launcher
{
    public static void main(String[] args) throws IOException
    {
        SwingUtilities.invokeLater(new Runnable() 
        {
            public void run()
            {
                new Gui();
            }
        });
    }
}

这是管理UI的类 GUI.java

public class Gui extends JFrame
{
    private JMenuBar menuBar=new JMenuBar();
    private JMenu info=new JMenu("Info");
    private JMenu help=new JMenu("Aiuto");
    private JMenu tool=new JMenu("Strumenti");
    private JMenuItem update=new JMenuItem("Controlla aggiornamenti");
    private JMenuItem resetTable=new JMenuItem("Reset tabella");
    private JMenuItem resetTextArea=new JMenuItem("Reset area di testo");
    private JMenuItem forum=new JMenuItem("Vai al forum");
    private JMenuItem guide=new JMenuItem("Guida");
    private JMenuItem information=new JMenuItem("Informazioni");
    private JMenuItem trouble=new JMenuItem("Segnala un problema");
    private final int GUI_WIDTH=1270;
    private final int GUI_HEIGHT=700;


    /**
     * Costruttore dell'interfaccia principale
     */
    public Gui()
    {
        setMenuBar();
        setTitle("WP 0.2");
        setGUI();
    }

    /**
     * Metodo che setta l'interfaccia grafica principale
     */
    private void setGUI()
    {
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(GUI_WIDTH,GUI_HEIGHT);
        Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();
        int width=(int) screenSize.getWidth();
        int height=(int) screenSize.getHeight();
        setLocation((width-GUI_WIDTH)/2,(height-GUI_HEIGHT)/2);
        setResizable(true);
    }

    /**
     * Metodo che aggiunge i vari componenti al menubar
     */
    public void setMenuBar()
    {
        setJMenuBar(menuBar); // Creazione del Menu
        menuBar.add(info);
        menuBar.add(tool);
        menuBar.add(help);

        info.add(update);
        tool.add(resetTable);
        tool.add(resetTextArea);
        help.add(forum);
        help.add(trouble);
    }
}

错误的例子:
Example 1
Example 2

问题是因为Swing不是线程安全的吗?

1 个答案:

答案 0 :(得分:0)

此外,setVisible(true)需要追求一切。当您将JFrame设置为可见时,它会绘制当前组件。如果您在setVisible之后调整大小并移动JFrame,则需要重绘JFrame。我通常把setvisible放在我的构造函数的末尾。

 private void setGUI()
{
    //setVisible(true);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(GUI_WIDTH,GUI_HEIGHT);
    Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();
    int width=(int) screenSize.getWidth();
    int height=(int) screenSize.getHeight();
    setLocation((width-GUI_WIDTH)/2,(height-GUI_HEIGHT)/2);
    setResizable(true);
    setVisible(true);
}