Question

在我的应用程序中，我在屏幕的一角显示一个Jframe以通知。我想只显示Jframe并且不在任务栏显示标题栏。

我该怎么做？

Answer 1

如果您希望窗口只显示并且既没有标题栏也没有出现在任务栏中，请使用JWindow。

如果您希望窗口显示并有标题栏但未显示在任务栏中，请使用JDialog。

Answer 2

JDK 1.7为您带来方法setType。使用以下方法。

JFrame.setType(javax.swing.JFrame.Type.UTILITY)

Answer 3

“你所要做的就是将你的JFrame”type“属性设置为”UTILITY“并且你拥有它！”

这确实有效，至少在Java 1.7下，它与上面的“myframe”.setType（Type.UTILITY）相同，而不是Type.POPUP。测试类型弹出窗口（在win 7下）无法从任务栏中删除它，Type.UTILITY可以。

未修饰将无法获得所需的结果（因为它会从窗口中删除标题栏，而不是任务栏）

public class Window extends Container implements Accessible {
    /**
     * Enumeration of available <i>window types</i>.
     *
     * A window type defines the generic visual appearance and behavior of a
     * top-level window. For example, the type may affect the kind of
     * decorations of a decorated {@code Frame} or {@code Dialog} instance.
     * <p>
     * Some platforms may not fully support a certain window type. Depending on
     * the level of support, some properties of the window type may be
     * disobeyed.
     *
     * @see   #getType
     * @see   #setType
     * @since 1.7
     */
    public static enum Type {
        /**
         * Represents a <i>normal</i> window.
         *
         * This is the default type for objects of the {@code Window} class or
         * its descendants. Use this type for regular top-level windows.
         */
        NORMAL,

        /**
         * Represents a <i>utility</i> window.
         *
         * A utility window is usually a small window such as a toolbar or a
         * palette. The native system may render the window with smaller
         * title-bar if the window is either a {@code Frame} or a {@code
         * Dialog} object, and if it has its decorations enabled.
         */
        UTILITY,

        /**
         * Represents a <i>popup</i> window.
         *
         * A popup window is a temporary window such as a drop-down menu or a
         * tooltip. On some platforms, windows of that type may be forcibly
         * made undecorated even if they are instances of the {@code Frame} or
         * {@code Dialog} class, and have decorations enabled.
         */
        POPUP
    }

Answer 4

您所要做的就是将您的JFrame“type”属性设置为“UTILITY”，并且您拥有它！

Answer 5

您可以尝试使用JWindow。

Answer 6

只需使用JWindow ......

import javax.swing.JWindow;
import java.awt.Toolkit;
import java.awt.Dimension;

public class Notification extends JWindow {
   private final int WIDTH = 200;
   private final int HEIGHT = 30;

   public Notification() {
      positionWindow();
      setVisible(true);
   }

   // Place the window in the bottom right corner of the screen
   private void positionWindow() {
      Toolkit aToolkit = Toolkit.getDefaultToolkit();
      Dimension screen = aToolkit.getScreenSize();
      int xPosition = screen.width - (WIDTH + 10); // Right edge of the screen
      int yPosition = screen.height - (HEIGHT + 10); // Bottom edge of the screen
      setBounds(xPosition, yPosition, WIDTH, HEIGHT);
   }
}

Answer 7

使用它，但它仅适用于JDK 1.7或openJDK 1.7：

// only on JDK 1.7 or openJDK 1.7

 JFrame f = new JFame(" frame not displayable in the task bar ");
    ...
    ...
    f.setType(Type.POPUP); // No Place on task bar, but stays on top of all others system applications frame

Answer 8

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package javaapplication4;

import javax.swing.JFrame;

/**
 *
 * @author ravi
 */
public class Main extends JFrame{

    /**
     * @param args the command line arguments
     */
    Main()
    {
       setState(JFrame.ICONIFIED);
        setSize(400, 400);
        setVisible(true);
    }
    public static void main(String[] args) {
        // TODO code application logic here
        Main m=new Main();
    }

}

Answer 9

尝试添加对setUndecorated(true);的通话。它告诉窗口管理器不要添加标题栏和窗口按钮。

注意：必须在未显示框架时调用此方法。

Answer 10

有一个答案提到要使用JWindow，它在Windows上是开箱即用的，另外两个则建议使用javax.swing.JFrame.Type.UTILITY，如果您已经使用JWindow，则Windows不需要。如果您发现自己在 Linux 下使用JWindow，但仍在任务栏中看到它，则可以改用POPUP：

sWindow.setType( Window.Type.POPUP );

不过，请阅读文档，这也可能会做其他您可能可能不需要的事情（例如删除装饰）。

显示Jframe但不在任务栏上显示标题栏

10 个答案: