can't import java models

It's probably because you changed the file name instead of the Geometry name.

To change the geometry name try this:

import org.lwjgl.opengl.GL11;
import net.minecraft.client.model.ModelBase;
import net.minecraft.client.model.ModelBox;
import net.minecraft.client.model.ModelRenderer;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.entity.Entity;

public class GeometryName extends ModelBase {
	private final ModelRenderer bone;

	public GeometryName() {
		textureWidth = 16;
		textureHeight = 16;

		bone = new ModelRenderer(this);
		bone.setRotationPoint(0.0F, 24.0F, 0.0F);
		bone.cubeList.add(new ModelBox(bone, 0, 0, -1.0F, -1.0F, 0.0F, 1, 1, 1, 0.0F, false));
	}

	@Override
	public void render(Entity entity, float f, float f1, float f2, float f3, float f4, float f5) {
		bone.render(f5);
	}
	public void setRotationAngle(ModelRenderer modelRenderer, float x, float y, float z) {
		modelRenderer.rotateAngleX = x;
		modelRenderer.rotateAngleY = y;
		modelRenderer.rotateAngleZ = z;
	}
}

You can open your java file in a text editor.

Where ever you see "GeometryName" (this will be a different name for you), write something else in ASCII letters.

The "GeometryName" can be found twice where the class is defined and where the constructor is defined.