java.lang.NoSuchMethodError : getPointer

Question

我在 IDE 中运行一个程序，但是在 IDE 中运行它自己的 jar 文件，一旦我将其导出为可运行的 jar 文件(并使其成为一个 fat jar，添加库和 native 等)，它给出以下错误:

Exception in thread "main" java.lang.NoSuchMethodError: getPointer
    at java.lang.ClassLoader$NativeLibrary.load(Native Method)
    at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1939)
    at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1864)
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1854)
    at java.lang.Runtime.loadLibrary0(Runtime.java:845)
    at java.lang.System.loadLibrary(System.java:1084)
    at org.lwjgl.Sys$1.run(Sys.java:72)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.lwjgl.Sys.doLoadLibrary(Sys.java:65)
    at org.lwjgl.Sys.loadLibrary(Sys.java:81)
    at org.lwjgl.Sys.<clinit>(Sys.java:98)
    at org.lwjgl.opengl.Display.<clinit>(Display.java:128)
    at Joehot200.TerrainDemo.setUpDisplay(TerrainDemo.java:1956)
    at Joehot200.TerrainDemo.startGame(TerrainDemo.java:2029)
    at Joehot200.Main.main(Main.java:55)

我设置的显示方法是:

private static void setUpDisplay() {
    try {
        DisplayMode displayMode = null;
        DisplayMode[] modes = Display.getAvailableDisplayModes(); //this is line 1956

         for (int i = 0; i < modes.length; i++)
         {
             if (modes[i].isFullscreenCapable())
               {
                    displayMode = modes[i];
               }
         }
         if (displayMode == null){
             displayMode = new DisplayMode(100, 100);
         }
        //Display.setDisplayMode(new DisplayMode(WINDOW_DIMENSIONS[0], WINDOW_DIMENSIONS[1]));
         Display.setDisplayMode(displayMode);
        Display.setResizable(true);
        Display.setTitle("Pirate game");
        //Display.setFullscreen(true);
        Display.create();

    } catch (LWJGLException e) {
        e.printStackTrace();
        cleanUp(true);
    }
}

如何修复这个愚蠢的错误并使其正常工作？

Answer 1

您很可能缺少 native 库。您可以像这样设置这些路径:

System.setProperty("org.lwjgl.librarypath", new File("pathToNatives").getAbsolutePath());

参见Here

如果您使用 LWJGL 附带的文件夹结构，您将必须选择正确的 native ，如下所示:

        switch(LWJGLUtil.getPlatform())
        {
            case LWJGLUtil.PLATFORM_WINDOWS:
            {
                JGLLib = new File("./native/windows/");
            }
            break;

            case LWJGLUtil.PLATFORM_LINUX:
            {
                JGLLib = new File("./native/linux/");
            }
            break;

            case LWJGLUtil.PLATFORM_MACOSX:
            {
                JGLLib = new File("./native/macosx/");
            }
            break;
        }

        System.setProperty("org.lwjgl.librarypath", JGLLib.getAbsolutePath());

最后:您正在使用 Slick2D，因此这可能会引起兴趣( Source ):

I looked over the error and figured it must be related to one of the files being older than another, and then I realized that I was using the lwjgl jar that came with slick. I replaced it with the one from the website, and it fixed my problem.