Java 我不明白如何使用TextureLoader，它会删除IO异常

大家好，我刚刚用java3d（SimpleUniverse）编写了代码，我不明白它遇到的异常以及为什么它不能读取文件。。。我试图通过TextureLoader将图像作为我的背景图像，谢谢大家的帮助。 这是一个例外：

com.sun.j3d.utils.image.ImageException:javax.imageio.IIOException: 无法读取输入文件！在 com.sun.j3d.utils.image.TextureLoader$1.run（TextureLoader.java:344）位于 java.security.AccessController.doPrivileged（本机方法）位于 com.sun.j3d.utils.image.TextureLoader。（TextureLoader.java:337） 在 com.sun.j3d.utils.image.TextureLoader.（TextureLoader.java:291） 在application.backGround.createSceneGraph（backGround.java:60）中 backGround.（backGround.java:39）位于 sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法） 位于sun.reflect.NativeConstructorAccessorImpl.newInstance（未知 来源）在 sun.reflect.delegatingConstructor AccessorImpl.newInstance（未知 源代码）位于java.lang.reflect.Constructor.newInstance（未知源代码） 位于java.lang.Class.newInstance（未知源） 位于的sun.applet.AppletPanel.createApplet（未知源） 位于的sun.applet.AppletPanel.runLoader（未知源） sun.applet.AppletPanel.run（未知源）位于 java.lang.Thread.run（未知源）由以下原因引起： javax.imageio.IIOException:无法读取输入文件！在 javax.imageio.imageio.read（未知源代码）位于 com.sun.j3d.utils.image.TextureLoader$1.run（TextureLoader.java:342） ... 14多

代码如下：

/====================================================================/

/*===================运行上述代码所需的平面类===========*/

package Aplication;

import javax.media.j3d.Appearance;
import javax.media.j3d.Geometry;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.Material;
import javax.media.j3d.QuadArray;
import javax.media.j3d.Shape3D;
import javax.vecmath.Color3f;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;


public class createPlane extends Shape3D {
    Shape3D plane;
      public class LitQuad extends Shape3D {
            LitQuad(Point3f A, Point3f B, Point3f C, Point3f D) {
              this.setGeometry(createGeometry(A, B, C, D));
              this.setAppearance(createAppearance());
            }


      Geometry createGeometry(Point3f A, Point3f B, Point3f C, Point3f D) {

          QuadArray plane = new QuadArray(4, GeometryArray.COORDINATES
              | GeometryArray.NORMALS);

          plane.setCoordinate(0, A);
          plane.setCoordinate(1, B);
          plane.setCoordinate(2, C);
          plane.setCoordinate(3, D);

          Vector3f a = new Vector3f(A.x - B.x, A.y - B.y, A.z - B.z);
          Vector3f b = new Vector3f(C.x - B.x, C.y - B.y, C.z - B.z);
          Vector3f n = new Vector3f();
          n.cross(b, a);

          n.normalize();

          plane.setNormal(0, n);
          plane.setNormal(1, n);
          plane.setNormal(2, n);
          plane.setNormal(3, n);

          return plane;
        }

       Appearance createAppearance() {
          Appearance appear = new Appearance();
          Color3f color = new Color3f(0.0f,1.5f,0.0f);
          Material material = new Material();
          material.setDiffuseColor(color);
          appear.setMaterial(material);

          return appear;
        }
      }

      public createPlane(){
            plane = new LitQuad(new Point3f(-1.5f, -0.5f, -5.0f),
                    new Point3f(-1.5f, -0.5f, 1.0f),
                    new Point3f(1.5f, -0.5f, 1.0f), new Point3f(1.5f, -0.5f, -5.0f));
      }
      public Shape3D getGeo(){
          return plane;
      }
}

---

“如果你想让我把代码放在这里”只是用需要包含2个类的代码更新了问题@谢谢你的帮助helping@lxg这是你的电话号码changes@Unheilig这是changes@lan这里是变化

package Aplication;

import javax.media.j3d.Appearance;
import javax.media.j3d.Geometry;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.Material;
import javax.media.j3d.QuadArray;
import javax.media.j3d.Shape3D;
import javax.vecmath.Color3f;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;


public class createPlane extends Shape3D {
    Shape3D plane;
      public class LitQuad extends Shape3D {
            LitQuad(Point3f A, Point3f B, Point3f C, Point3f D) {
              this.setGeometry(createGeometry(A, B, C, D));
              this.setAppearance(createAppearance());
            }


      Geometry createGeometry(Point3f A, Point3f B, Point3f C, Point3f D) {

          QuadArray plane = new QuadArray(4, GeometryArray.COORDINATES
              | GeometryArray.NORMALS);

          plane.setCoordinate(0, A);
          plane.setCoordinate(1, B);
          plane.setCoordinate(2, C);
          plane.setCoordinate(3, D);

          Vector3f a = new Vector3f(A.x - B.x, A.y - B.y, A.z - B.z);
          Vector3f b = new Vector3f(C.x - B.x, C.y - B.y, C.z - B.z);
          Vector3f n = new Vector3f();
          n.cross(b, a);

          n.normalize();

          plane.setNormal(0, n);
          plane.setNormal(1, n);
          plane.setNormal(2, n);
          plane.setNormal(3, n);

          return plane;
        }

       Appearance createAppearance() {
          Appearance appear = new Appearance();
          Color3f color = new Color3f(0.0f,1.5f,0.0f);
          Material material = new Material();
          material.setDiffuseColor(color);
          appear.setMaterial(material);

          return appear;
        }
      }

      public createPlane(){
            plane = new LitQuad(new Point3f(-1.5f, -0.5f, -5.0f),
                    new Point3f(-1.5f, -0.5f, 1.0f),
                    new Point3f(1.5f, -0.5f, 1.0f), new Point3f(1.5f, -0.5f, -5.0f));
      }
      public Shape3D getGeo(){
          return plane;
      }
}