Slick2D測試應用程序導致UnsatisfiedLinkException：錯誤ELFCLASS

Question

我正在寫一個基於java的遊戲，試圖使用Slick2D。然而，當我嘗試運行測試應用（下），我得到這個：

OpenJDK Server VM warning: You have loaded library /home/andrzej/Programming/Java/HeroesOfZether/lib/lwjgl/native/linux/liblwjgl.so which might have disabled stack guard. The VM will try to fix the stack guard now. 
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'. 
Exception in thread "main" java.lang.UnsatisfiedLinkError: /home/andrzej/Programming/Java/HeroesOfZether/lib/lwjgl/native/linux/liblwjgl.so: /home/andrzej/Programming/Java/HeroesOfZether/lib/lwjgl/native/linux/liblwjgl.so: wrong ELF class: ELFCLASS64 (Possible cause: architecture word width mismatch) 
    at java.lang.ClassLoader$NativeLibrary.load(Native Method) 
    at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1965) 
    at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1890) 
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1880) 
    at java.lang.Runtime.loadLibrary0(Runtime.java:849) 
    at java.lang.System.loadLibrary(System.java:1088) 
    at org.lwjgl.Sys$1.run(Sys.java:72) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at org.lwjgl.Sys.doLoadLibrary(Sys.java:66) 
    at org.lwjgl.Sys.loadLibrary(Sys.java:96) 
    at org.lwjgl.Sys.<clinit>(Sys.java:117) 
    at org.lwjgl.opengl.Display.<clinit>(Display.java:135) 
    at org.newdawn.slick.AppGameContainer$1.run(AppGameContainer.java:39) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at org.newdawn.slick.AppGameContainer.<clinit>(AppGameContainer.java:36) 
    at simpleslickgame.SimpleSlickGame.main(SimpleSlickGame.java:34) 

我已經做了完全一樣the tutorial on Slick2D說，下載並解壓光滑和LWJGL檔案，創建了一個用戶庫，添加運行VM參數參考與原生文件夾（liblwjgl.so，liblwjgl32.so，libopenal.so，libopenal32.so）相關的文件夾，如您所見，JVM發現它們沒有問題，但隨後遇到體系結構衝突。我在32位Linux Mint上運行Eclipse，並使用JDK進行了正確的安裝和配置，我在沒有任何問題的情況下製作了一些小應用程序。在LWJGL站點上沒有單獨的32位下載選項，並且刪除名稱中不包含「32」的庫都返回UnsatisfiedLinkException：java.library.path中沒有lwjgl。這是測試應用代碼：

package simpleslickgame; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import org.newdawn.slick.AppGameContainer; 
import org.newdawn.slick.BasicGame; 
import org.newdawn.slick.GameContainer; 
import org.newdawn.slick.Graphics; 
import org.newdawn.slick.SlickException; 

public class SimpleSlickGame extends BasicGame 
{ 
    public SimpleSlickGame(String gamename) 
    { 
     super(gamename); 
    } 

    @Override 
    public void init(GameContainer gc) throws SlickException {} 

    @Override 
    public void update(GameContainer gc, int i) throws SlickException {} 

    @Override 
    public void render(GameContainer gc, Graphics g) throws SlickException 
    { 
     g.drawString("Howdy!", 10, 10); 
    } 

    public static void main(String[] args) 
    { 
     try 
     { 
      AppGameContainer appgc; 
      appgc = new AppGameContainer(new SimpleSlickGame("Simple Slick Game")); 
      appgc.setDisplayMode(640, 480, false); 
      appgc.start(); 
     } 
     catch (SlickException ex) 
     { 
      Logger.getLogger(SimpleSlickGame.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 
} 

有人可以告訴我我做錯了什麼，以及如何解決它？

Answer 1

這個wrong ELF class: ELFCLASS64 (Possible cause: architecture word width mismatch)意味着你正試圖在32位JVM中運行一個64位LWJGL。

您將不得不切換到64位JVM，或者如果您已經安裝了，您可以設置LD_LIBRARY_PATH以使Linux能夠找到正確的庫。請參見[這裏]

如果您使用的是32位機器，則必須切換到32位LWJGL。

進一步的參考文獻：1; 2