Java J-猴亚类
我是java和J-monkey的新手，我正在尝试制作一个java游戏，所以对于菜单，我制作了一个枚举，这样我可以在我的任何状态之间切换，但是我想让主文件更短，这样它就可以轻松读取，所以我正在制作子类。问题是，当运行游戏时，它会给我一个错误，说“线程中抛出了未捕获的异常”[LWJGL Renderer Thread，5，main]NullPointerException“我认为这个问题一定是管道的问题，这是我的主文件的代码：Java J-猴亚类,java,nullpointerexception,jmonkeyengine,Java,Nullpointerexception,Jmonkeyengine,我是java和J-monkey的新手，我正在尝试制作一个java游戏，所以对于菜单，我制作了一个枚举，这样我可以在我的任何状态之间切换，但是我想让主文件更短，这样它就可以轻松读取，所以我正在制作子类。问题是，当运行游戏时，它会给我一个错误，说“线程中抛出了未捕获的异常”[LWJGL Renderer Thread，5，main]NullPointerException“我认为这个问题一定是管道的问题，这是我的主文件的代码： package mygame; import com.jme3.app
package mygame;
import com.jme3.app.SimpleApplication;
import com.jme3.font.BitmapText;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.renderer.RenderManager;
import com.jme3.scene.Spatial;
import com.jme3.scene.Geometry;
import com.jme3.input.*;
import com.jme3.input.controls.*;
public class Main extends SimpleApplication {
//GameStates
enum GameState{Logo, Menu, Playing, Option};
GameState gameState = GameState.Logo;
//Class Variables
Logo logo;
public Main() {
logo = new Logo();
}
public static void main(String[] args) {
Main app = new Main();
app.start();
}
public static void logo(String[] args) {
Logo app = new Logo();
app.start();
}
@Override
public void simpleInitApp() {
//Load
flyCam.setMoveSpeed(20);
if(gameState == GameState.Logo){
logo.simpleInitApp();
}
}
@Override
public void simpleUpdate(float tpf) {
}
@Override
public void simpleRender(RenderManager rm) {
//TODO: add render code
//Load
if(gameState == GameState.Logo)
{
}
}
}
package mygame;
import com.jme3.app.SimpleApplication;
import com.jme3.renderer.RenderManager;
import com.jme3.scene.Spatial;
public class Logo extends SimpleApplication {
@Override
public void simpleInitApp() {
Spatial Logo_Model = assetManager.loadModel("Models/Teapot/Logo.obj");
rootNode.attachChild(Logo_Model);
}
public void simpleRender(RenderManager rm) {
//Load
}
}
AM com.jme3.app.Application handleError SEVERE: Uncaught exception
thrown in Thread[LWJGL Renderer Thread,5,main]
java.lang.NullPointerException
at mygame.Logo.simpleInitApp(Logo.java:17)
at mygame.Main.simpleInitApp(Main.java:46)
at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:225)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:130)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:207)
at java.lang.Thread.run(Thread.java:722)
Nov 09, 2013 11:29:51 AM com.jme3.renderer.lwjgl.LwjglRenderer cleanup
INFO: Deleting objects and invalidating state
Nov 09, 2013 11:29:51 AM com.jme3.input.lwjgl.LwjglMouseInput destroy
INFO: Mouse destroyed.
Nov 09, 2013 11:29:51 AM com.jme3.input.lwjgl.LwjglKeyInput destroy
INFO: Keyboard destroyed.
Nov 09, 2013 11:29:51 AM com.jme3.system.lwjgl.LwjglAbstractDisplay deinitInThread
INFO: Display destroyed.
问题是
assetManagerassetManager