原来是jME的教程有误~

在配置好了jME之后写了一个HelloWorld程序：

import com.jme.app.SimpleGame; 
import com.jme.scene.shape.Box; 
import com.jme.math.Vector3f; 
 
/** 
 * Started Date: Jul 20, 2004<br><br> 
 * Simple HelloWorld program for jME 
 *  
 * @author Jack Lindamood 
 */ 
public class HelloWorld extends SimpleGame{ 
    public static void main(String[] args) { 
        HelloWorld app = new HelloWorld();    // Create Object 
        // Signal to show properties dialog 
        app.setDialogBehaviour(SimpleGame.ALWAYS_SHOW_PROPS_DIALOG); 
        app.start();    // Start the program 
    } 
  
    protected void simpleInitGame() { 
// Make a box 
Boxb = new Box("Mybox", 
       new Vector3f(0,0,0), 
       new Vector3f(1,1,1));            
rootNode.attachChild(b);    // Put it in the scene graph 
    } 
} 

 

 

后来发现

app.setDialogBehaviour(SimpleGame.ALWAYS_SHOW_PROPS_DIALOG);

 

这一句中在SimpleGame中找不到ALWAYS_SHOW_PROPS_DIALOG，实际上的确是没有这个参数。后来看了自带文档的例子，发现写法已经改变了。

奇怪的是，在去掉这一句之后，运行还是出现Exception in Loop与空指针异常。

Exception Stack就算了。但是在运行了正确的例子之后再次运行这个程序，发现一切正常。好吧，无语了~

下面是自带的正确例子：

/*
 * Copyright (c) 2003-2009 jMonkeyEngine
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 
 *   may be used to endorse or promote products derived from this software 
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package jmetest.TutorialGuide;

import com.jme.app.SimpleGame;
import com.jme.math.Vector3f;
import com.jme.scene.shape.Box;

/**
 * Started Date: Jul 20, 2004<br><br>
 * Simple HelloWorld program for jME
 * 
 * @author Jack Lindamood
 */
public class HelloWorld extends SimpleGame{
    public static void main(String[] args) {
        HelloWorld app=new HelloWorld();    // Create Object
        app.setConfigShowMode(ConfigShowMode.AlwaysShow);
        // Signal to show properties dialog
        app.start();    // Start the program
    }
    protected void simpleInitGame() {
        Box b=new Box("My box",new Vector3f(0,0,0),new Vector3f(1,1,1));    // Make a box
        rootNode.attachChild(b);    // Put it in the scene graph
    }
}

 

各位看官遇到这个问题，可以参考一下这个~