java - 无法找到正确的 JVM 选项

Question

好吧，首先，我是 Java 新手，但不是编程新手。 对于个人项目，我决定我应该使用 Slick2D，这是一个 Java 图形库，但我遇到了一个我现在无法解决的问题。

考虑以下因素:

• 我使用 Netbeans
• 我目前使用的是 linux

据我了解，slick2d 使用 lwgjl。我已按照以下页面上的说明进行操作: Setting up Slick2D for netbeans

我认为我的问题是为我的 JVM 提供正确的选项。 目前我设置的是:

-Djava.library.path=/home/karel/Téléchargements/slick/native/unix

这是我得到的当前错误输出:

run:
Exception in thread "main" java.lang.UnsatisfiedLinkError: no lwjgl64     in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1122)
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:87)
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 jcoinche.client.JcoincheClient.main(JcoincheClient.java:29)
/home/karel/.cache/netbeans/8.1/executor-snippets/run.xml:53: Java returned: 1
BUILD FAILED (total time: 0 seconds)

我的代码如下(好吧，需要一个库的部分，但不起作用 - 顺便说一下，这都是教程 Material 。我自己没有做任何事情):

package jcoinche.client;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.util.Scanner;
import static jcoinche.client.Game.gamename;
import static jcoinche.client.Game.xSize;
import static jcoinche.client.Game.ySize;
import org.newdawn.slick.AppGameContainer;
import org.newdawn.slick.SlickException;

public class JcoincheClient 
{
public static void main(String[] args) 
{
   Socket socket;

   AppGameContainer appgc;
   try
   {
        appgc = new AppGameContainer(new Game(gamename));
        appgc.setDisplayMode(xSize, ySize, false);
        appgc.setTargetFrameRate(60);
        appgc.start();
   }
catch(SlickException e)
{
     e.printStackTrace();
}
}

游戏.java:

package jcoinche.client;

import org.newdawn.slick.*;
import org.newdawn.slick.state.*;

public class Game extends StateBasedGame
{

   public static final String gamename = "MyGameName";
   public static final int play = 0;
   public static final int xSize = 400;
   public static final int ySize = 300;

   public Game(String gamename){
      super(gamename);
      this.addState(new Play());
   }

   public void initStatesList(GameContainer gc) throws SlickException{
      this.getState(play).init(gc, this);
      this.enterState(play);
   }

}

播放.java:

package jcoinche.client;

import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.state.BasicGameState;
import org.newdawn.slick.state.StateBasedGame;

public class Play extends BasicGameState
{
  public Play() 
        {

    }

    public void init(GameContainer gc, StateBasedGame sbg)
        throws SlickException 
        {

    }

    public void render(GameContainer gc, StateBasedGame sbg, Graphics g)
            throws SlickException 
        {

    }

    public void update(GameContainer gc, StateBasedGame sbg, int delta)
            throws SlickException 
        {

    }

    public int getID() 
        {
        return 0;
    }  
}

Answer 1

错误告诉您缺少名为“lwjgl64”的文件。您收到一个 UnsatisfiedLinkError，根据 Java 文档，它是:

Thrown if the Java Virtual Machine cannot find an appropriate native-language definition of a method declared native.

现在，您是单独使用 Slick2D 吗？或者你有 LWJGL 和 Slick2D？ Slick2D 不是独立的；你需要 LWJGL 来运行它。我建议从 their site, 获取 LWJGL并将其 native 文件夹添加到类路径中。

在 Slick2D 文档中，他们这样写:

   -Djava.library.path=<lwjgl-X.X path>/native/<linux|macosx|solaris|windows> 

Source