＆QUOT;缓冲区尚未创建＆QUOT; ......而创建缓冲区 [英] "Buffers have not been created" ... whilst creating buffers

问题描述

我有（我认为是）一个JFrame的一个简单的BufferStrategy中。它是像这样创建：

  //缓冲区
    container.createBufferStrategy（2）;
    策略= container.getBufferStrategy（）;
 

不过，偶尔我收到以下错误（它指向preceeding片段作为违规项目的第一行）：

的 java.lang.IllegalStateException：没有创建缓冲区的

此错误是特殊的，因为它来得快，去 - 有时它被触发时，有时没有。我的犯罪嫌疑人的，这意味着它是一个线程问题。没有任何人有任何指针，以什么可能会在这里吗？我有点茫然，因为我已经尝试做Java的说什么要我做的！

编辑：全跟踪：

 异常线程mainjava.lang.IllegalStateException：缓冲区没有创建
        在sun.awt.windows.WComponentPeer.getBackBuffer（WComponentPeer.java:877）
        在java.awt.Component中$ FlipBufferStrategy.getBackBuffer（Component.java:3815）
        在java.awt.Component中$ FlipBufferStrategy.updateInternalBuffers（Component.java:3800）
        在java.awt.Component中$ FlipBufferStrategy.createBuffers（Component.java:3791）
        在java.awt.Component中$ FlipBufferStrategy＆LT;＆初始化GT;（Component.java:3730）
        在java.awt.Component中$ FlipSubRegionBufferStrategy＆LT;＆初始化GT;（Component.java:4253）
        在java.awt.Component.createBufferStrategy（Component.java:3612）
        在java.awt.Window.createBufferStrategy（Window.java:3015）
        在java.awt.Component.createBufferStrategy（Component.java:3536）
        在java.awt.Window.createBufferStrategy（Window.java:2990）
 

解决方案

帧需要打电话时要显示的 createBufferStrategy 。另外，作为camickr指出，你需要从EDT调用它。

要确保这一点的方法之一是延长的JFrame 和覆盖信息addNotify ：

 类MyFrame扩展的JFrame {
    公共无效信息addNotify（）{
        super.addNotify（）;
        // 缓冲
        createBufferStrategy（2）;
        策略= getBufferStrategy（）;
    }
}
 

I have (what I thought was) a straightforward BufferStrategy for a JFrame. It is created like so:

    // Buffer
    container.createBufferStrategy(2);           
    strategy = container.getBufferStrategy();

However, occassionally I receive the following error (which points to the first line of the preceeding snippet as the offending item) :

java.lang.IllegalStateException: Buffers have not been created

This error is peculiar as it comes and goes - sometimes it is triggered, sometimes not. I suspect this means it's a threading issue. Does anyone have any pointers as to what might be going on here? I'm a little at a loss, since I'm already trying to do what Java says it wants me to do!

edit: full trace:

Exception in thread "main" java.lang.IllegalStateException: Buffers have not been created
        at sun.awt.windows.WComponentPeer.getBackBuffer(WComponentPeer.java:877)
        at java.awt.Component$FlipBufferStrategy.getBackBuffer(Component.java:3815)
        at java.awt.Component$FlipBufferStrategy.updateInternalBuffers(Component.java:3800)
        at java.awt.Component$FlipBufferStrategy.createBuffers(Component.java:3791)
        at java.awt.Component$FlipBufferStrategy.<init>(Component.java:3730)
        at java.awt.Component$FlipSubRegionBufferStrategy.<init>(Component.java:4253)
        at java.awt.Component.createBufferStrategy(Component.java:3612)
        at java.awt.Window.createBufferStrategy(Window.java:3015)
        at java.awt.Component.createBufferStrategy(Component.java:3536)
        at java.awt.Window.createBufferStrategy(Window.java:2990)

解决方案

The frame needs to be displayable when you call createBufferStrategy. Also as camickr has pointed out you need to call it from the EDT.

One way to ensure this is to extend JFrame and override addNotify:

class MyFrame extends JFrame {
    public void addNotify() {
        super.addNotify();
        // Buffer
        createBufferStrategy(2);           
        strategy = getBufferStrategy();
    }
}

这篇关于＆QUOT;缓冲区尚未创建＆QUOT; ......而创建缓冲区的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！