I can't import my .java entity

I can't import my java entity! Why?

Code:

public class hacker<T extends Entity> extends EntityModel<T> {
	
public static final ModelLayerLocation LAYER_LOCATION = new ModelLayerLocation(new ResourceLocation("modid", "hacker"), "main");
	private final ModelPart hacker;

	public hacker(ModelPart root) {
		this.hacker = root.getChild("hacker");
	}

	public static LayerDefinition createBodyLayer() {
		MeshDefinition meshdefinition = new MeshDefinition();
		PartDefinition partdefinition = meshdefinition.getRoot();

		PartDefinition hacker = partdefinition.addOrReplaceChild("hacker", CubeListBuilder.create(), PartPose.offset(0.0F, 0.0F, 0.0F));

		PartDefinition Head = hacker.addOrReplaceChild("Head", CubeListBuilder.create().texOffs(0, 0).addBox(-4.0F, -8.0F, -4.0F, 8.0F, 8.0F, 8.0F, new CubeDeformation(0.0F)), PartPose.offset(0.0F, 0.0F, 0.0F));

		PartDefinition Mask = Head.addOrReplaceChild("Mask", CubeListBuilder.create(), PartPose.offset(0.0F, 0.0F, 0.0F));

		PartDefinition Maskrope3_r1 = Mask.addOrReplaceChild("Maskrope3_r1", CubeListBuilder.create().texOffs(25, 40).addBox(-4.0F, -6.0F, -0.6F, 8.0F, 1.0F, 1.0F, new CubeDeformation(0.0F))
		.texOffs(24, 34).addBox(3.0F, -6.0F, -7.6F, 1.0F, 1.0F, 8.0F, new CubeDeformation(0.0F))
		.texOffs(24, 34).addBox(-4.0F, -6.0F, -7.6F, 1.0F, 1.0F, 8.0F, new CubeDeformation(0.0F)), PartPose.offsetAndRotation(0.0F, 0.0F, 0.0F, -0.829F, 0.0F, 0.0F));

		PartDefinition Mask_r1 = Mask.addOrReplaceChild("Mask_r1", CubeListBuilder.create().texOffs(0, 33).addBox(-4.0F, -8.0F, -9.0F, 8.0F, 8.0F, 1.0F, new CubeDeformation(0.0F)), PartPose.offsetAndRotation(0.0F, 0.0F, 0.0F, -0.9163F, 0.0F, 0.0F));

		PartDefinition Body = hacker.addOrReplaceChild("Body", CubeListBuilder.create().texOffs(16, 16).addBox(-4.0F, 0.0F, -2.0F, 8.0F, 12.0F, 4.0F, new CubeDeformation(0.0F)), PartPose.offset(0.0F, 0.0F, 0.0F));

		PartDefinition RightArm = hacker.addOrReplaceChild("RightArm", CubeListBuilder.create().texOffs(40, 16).addBox(-3.0F, -2.0F, -2.0F, 4.0F, 12.0F, 4.0F, new CubeDeformation(0.0F)), PartPose.offset(-5.0F, 2.0F, 0.0F));

		PartDefinition LeftArm = hacker.addOrReplaceChild("LeftArm", CubeListBuilder.create().texOffs(32, 48).addBox(-1.0F, -2.0F, -2.0F, 4.0F, 12.0F, 4.0F, new CubeDeformation(0.0F)), PartPose.offset(5.0F, 2.0F, 0.0F));

		PartDefinition RightLeg = hacker.addOrReplaceChild("RightLeg", CubeListBuilder.create().texOffs(0, 16).addBox(-2.0F, 0.0F, -2.0F, 4.0F, 12.0F, 4.0F, new CubeDeformation(0.0F)), PartPose.offset(-1.9F, 12.0F, 0.0F));

		PartDefinition LeftLeg = hacker.addOrReplaceChild("LeftLeg", CubeListBuilder.create().texOffs(16, 48).addBox(-2.0F, 0.0F, -2.0F, 4.0F, 12.0F, 4.0F, new CubeDeformation(0.0F)), PartPose.offset(1.9F, 12.0F, 0.0F));

		return LayerDefinition.create(meshdefinition, 64, 64);
	}

	@Override
	public void setupAnim(T entity, float limbSwing, float limbSwingAmount, float ageInTicks, float netHeadYaw, float headPitch) {

	}

	@Override
	public void renderToBuffer(PoseStack poseStack, VertexConsumer buffer, int packedLight, int packedOverlay, float red, float green, float blue, float alpha) {
		hacker.render(poseStack, buffer, packedLight, packedOverlay);
	}
}

File name: hacker.java