全屏獨佔模式錯誤

我想使用全屏模式，但當我按下「F」鍵時，我總是收到一個複雜的錯誤。我使用eclipse，它不顯示任何錯誤，並且所有內容都被導入。如果有人擅長代碼，你能告訴我我做錯了什麼嗎？全屏獨佔模式錯誤

的代碼片段：

GraphicsEnviroment ge = GraphicsEnviroment.getLocalGraphicsEnviroment(); 
GraphicsDevice gd = ge.GetDefaultScreenDevice(); 
private boolean FullScreen = false; 
JFrame frame = new JFrame(TITLE); 

// Not shown: The JFrame is set up etc., and a separate class extends KeyAdapter and runs keyPressed 

public void keyPressed(KeyEvent e){ 
    int key = e.getKeyCode(); 
     if(key == KeyEvent.VK_F){ 
     if(!FullScreen){ 
      if(gd.isFullScreenSupported()){ 
       frame.setUndecorated(true); 
       gd.setFullScreenWindow(frame); 
            FullScreen = true; 
      } 
     } else{ 
      frame.setUndecorated(false); 
      gd.setFullScreenWindow(null); 
     } 
    }

錯誤：

Exception in thread "AWT-EventQueue-0" java.awt.IllegalComponentStateException: The frame is displayable. 
at java.awt.Frame.setUndecorated(Frame.java:923) 
at com.Ward.src.main.Game.keyPressed(Game.java:167) 
at com.Ward.src.main.KeyboardInput.keyPressed(KeyboardInput.java:15) 
at java.awt.Component.processKeyEvent(Component.java:6463) 
at java.awt.Component.processEvent(Component.java:6282) 
at java.awt.Component.dispatchEventImpl(Component.java:4861) 
at java.awt.Component.dispatchEvent(Component.java:4687) 
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895) 
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762) 
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027) 
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899) 
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727) 
at java.awt.Component.dispatchEventImpl(Component.java:4731) 
at java.awt.Component.dispatchEvent(Component.java:4687) 
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735) 
at java.awt.EventQueue.access$200(EventQueue.java:103) 
at java.awt.EventQueue$3.run(EventQueue.java:694) 
at java.awt.EventQueue$3.run(EventQueue.java:692) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) 
at java.awt.EventQueue$4.run(EventQueue.java:708) 
at java.awt.EventQueue$4.run(EventQueue.java:706) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) 
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) 
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) 
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

來源

2013-08-05 user2653616

在使用之前，您需要初始化gd至GraphicsEnvironment.getGraphicsEnvironment.getDefaultScreenDevice()。

更新：既然OP已經解決了這個問題，還有另一個問題。問題是在已經顯示的窗口上更改屬性。如果正在顯示窗口，則無法更改屬性，因爲操作系統在顯示時無法更改屬性。我認爲這可以通過省略對setUndecorated的調用來解決，全屏窗口不必非修飾（我認爲）。

來源

2013-08-05 22:34:22 tbodt

我換成了GraphicsDevice gd;與GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment（）; \t GraphicsDevice gd = ge.getDefaultScreenDevice（）;但我仍然得到錯誤！幫幫我！ – user2653616

更正錯誤後修復當前錯誤 – user2653616

我更新了我的答案 – tbodt

是這樣的：

if(gd.isFullScreenSupported()){

線165？如果是這樣，gd set是什麼？

上述例外給出了發生錯誤的類/行號。這應該足以讓你知道什麼是空的。

來源

2013-08-05 22:33:11

我認爲frame.setUndecorated（真）;現在正在返回一個錯誤。可以返回一個錯誤？ – user2653616

frame.dispose(); // Fixes the issue 
frame.setUndecorated(true); 
frame.setVisible();

我知道這個問題是舊的，但我只是處理這個問題我自己，解決工作正常，我。

來源

2016-03-19 22:02:30

在您的代碼中只添加「setUndecorated（true）」。實施例：

public launch() { 

    setSize(300, 200); 
    setUndecorated(true); 

}

來源

2018-01-11 12:27:55

全屏獨佔模式錯誤

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