So, help me, how i can draw a diffrent texture for ecah face?
And why back textures like a mirror? should i have a direction for back faces?

So, i made it like this:
public class TextureBox extends Object3D{
   
   int size = 1;
   
   public  TextureBox(int size){   
      
      super(size);
       SimpleVector upperLeftFront=new SimpleVector(-size,-size,-size);
       SimpleVector upperRightFront=new SimpleVector(size,-size,-size);
       SimpleVector lowerLeftFront=new SimpleVector(-size,size,-size);
       SimpleVector lowerRightFront=new SimpleVector(size,size,-size);
       
       SimpleVector upperLeftBack = new SimpleVector( -size, -size, size);
       SimpleVector upperRightBack = new SimpleVector(size, -size, size);
       SimpleVector lowerLeftBack = new SimpleVector( -size, size, size);
       SimpleVector lowerRightBack = new SimpleVector(size, size, size);
       
       // Front
       this.addTriangle(upperLeftFront,0,0, lowerLeftFront,0,size, upperRightFront,size,0);
       this.addTriangle(upperRightFront,size,0, lowerLeftFront,0,size, lowerRightFront,size,size);
       
       // Back
       this.addTriangle(upperLeftBack,0,0, upperRightBack,size,0, lowerLeftBack,0,size);
       this.addTriangle(upperRightBack,size,0, lowerRightBack,size,size, lowerLeftBack,0,size);
       
       // Upper
       this.addTriangle(upperLeftBack,0,0, upperLeftFront,0,size, upperRightBack,size,0);
       this.addTriangle(upperRightBack,size,0, upperLeftFront,0,size, upperRightFront,size,size);
       
       // Lower
       this.addTriangle(lowerLeftBack,0,0, lowerRightBack,size,0, lowerLeftFront,0,size);
       this.addTriangle(lowerRightBack,size,0, lowerRightFront,size,size, lowerLeftFront,0,size);
       
       // Left
       this.addTriangle(upperLeftFront,0,0, upperLeftBack,size,0, lowerLeftFront,0,size);
       this.addTriangle(upperLeftBack,size,0, lowerLeftBack,size,size, lowerLeftFront,0,size);
       
       // Right
       this.addTriangle(upperRightFront,0,0, lowerRightFront,0,size, upperRightBack,size,0);
       this.addTriangle(upperRightBack,size,0, lowerRightFront, 0,size, lowerRightBack,size,size);
       this.build();
   }

}



But when i'm use it like this:
cube = new TextureBox( 12);
cube.setTexture("texture");
I see 12x12 textures per face, and i cant understand why...
What should i do for see 1 texture per 1 face?

A simple cube can also be done in code pretty easily. The objects generated by the Primitives class don't have any uv-mapping. See this thread: http://www.jpct.net/forum2/index.php/topic,393.0.html. It also contains some code at the end to create a cube with proper uv-mapping.

So, with primitives i can't cover all cube by the different textures?
And what about size of object, for example i use Primitives.getCube(12), how can i use scale in this code?
Texture must be a triangle?
Object3D box=new Object3D(12);
   
    SimpleVector upperLeftFront=new SimpleVector(-1,-1,-1);
    SimpleVector upperRightFront=new SimpleVector(1,-1,-1);
    SimpleVector lowerLeftFront=new SimpleVector(-1,1,-1);
    SimpleVector lowerRightFront=new SimpleVector(1,1,-1);
   
    SimpleVector upperLeftBack = new SimpleVector( -1, -1, 1);
    SimpleVector upperRightBack = new SimpleVector(1, -1, 1);
    SimpleVector lowerLeftBack = new SimpleVector( -1, 1, 1);
    SimpleVector lowerRightBack = new SimpleVector(1, 1, 1);

I think i need smth like skyBox, but with cube functionality, is it possible in jpct android engine?
it wold be great for having a constructor for cube like:
public SkyBox(java.lang.String left,
              java.lang.String front,
              java.lang.String right,
              java.lang.String back,
              java.lang.String up,
              java.lang.String down,
              float size)