Not Valid Java Name

I made a model with Blockbench and after exporting I haven't edited the code. In Mcreator I simply tried to open it and it says:

"That's not a valid java name".

Here's the model code:

// Made with Blockbench 3.5.2
// Exported for Minecraft version 1.14
// Paste this class into your mod and generate all required imports

public class rock_crab extends EntityModel {
    private final RendererModel body;
    private final RendererModel right_eye;
    private final RendererModel left_eye;
    private final RendererModel rock;
    private final RendererModel rock2;
    private final RendererModel rock4;
    private final RendererModel rock3;
    private final RendererModel right_claw;
    private final RendererModel left_claw;
    private final RendererModel right_legs;
    private final RendererModel right_leg1;
    private final RendererModel right_leg2;
    private final RendererModel right_leg3;
    private final RendererModel left_legs;
    private final RendererModel left_leg4;
    private final RendererModel left_leg5;
    private final RendererModel left_leg6;

    public rock_crab() {
        textureWidth = 64;
        textureHeight = 64;

        body = new RendererModel(this);
        body.setRotationPoint(6.0F, 21.0F, -4.0F);
        setRotationAngle(body, -0.1745F, 0.0F, 0.0F);
        body.cubeList.add(new ModelBox(body, 0, 0, -12.0F, -6.0F, -2.0F, 12, 6, 12, 0.0F, false));

        right_eye = new RendererModel(this);
        right_eye.setRotationPoint(0.0F, 0.0F, 0.0F);
        body.addChild(right_eye);
        setRotationAngle(right_eye, 0.2618F, 0.0F, -0.1745F);
        right_eye.cubeList.add(new ModelBox(right_eye, 0, 32, -9.0F, -11.0F, -1.0F, 2, 5, 2, 0.0F, false));

        left_eye = new RendererModel(this);
        left_eye.setRotationPoint(-12.0F, 0.0F, 0.0F);
        body.addChild(left_eye);
        setRotationAngle(left_eye, 0.2618F, 0.0F, 0.1745F);
        left_eye.cubeList.add(new ModelBox(left_eye, 0, 0, 7.0F, -11.0F, -1.0F, 2, 5, 2, 0.0F, false));

        rock = new RendererModel(this);
        rock.setRotationPoint(-3.0F, 0.0F, 0.0F);
        body.addChild(rock);
        setRotationAngle(rock, -0.2618F, 0.0F, 0.2618F);
        rock.cubeList.add(new ModelBox(rock, 0, 18, -7.0F, -11.0F, -1.0F, 7, 7, 7, 0.0F, false));

        rock2 = new RendererModel(this);
        rock2.setRotationPoint(-3.0F, 0.0F, 0.0F);
        body.addChild(rock2);
        setRotationAngle(rock2, -0.2618F, -0.5236F, -0.5236F);
        rock2.cubeList.add(new ModelBox(rock2, 36, 0, -3.7F, -13.0F, 2.0F, 5, 6, 5, 0.0F, false));

        rock4 = new RendererModel(this);
        rock4.setRotationPoint(-9.0F, 0.0F, 0.0F);
        body.addChild(rock4);
        setRotationAngle(rock4, -0.2618F, 0.5236F, 0.6981F);
        rock4.cubeList.add(new ModelBox(rock4, 40, 18, -0.3F, -13.0F, -1.0F, 4, 5, 4, 0.0F, false));

        rock3 = new RendererModel(this);
        rock3.setRotationPoint(-3.0F, 0.0F, 0.0F);
        body.addChild(rock3);
        setRotationAngle(rock3, -0.8727F, -0.1745F, 0.4363F);
        rock3.cubeList.add(new ModelBox(rock3, 28, 35, -4.7F, -13.0F, 1.7F, 5, 6, 5, 0.0F, false));

        right_claw = new RendererModel(this);
        right_claw.setRotationPoint(-4.0F, 23.0F, 5.0F);
        setRotationAngle(right_claw, 0.1745F, -0.3491F, 0.0F);
        right_claw.cubeList.add(new ModelBox(right_claw, 0, 32, -10.0F, -6.0F, -15.0F, 6, 3, 8, 0.5F, false));

        left_claw = new RendererModel(this);
        left_claw.setRotationPoint(4.0F, 23.0F, 5.0F);
        setRotationAngle(left_claw, 0.1745F, 0.3491F, 0.0F);
        left_claw.cubeList.add(new ModelBox(left_claw, 20, 24, 4.0F, -6.0F, -15.0F, 6, 3, 8, 0.5F, false));

        right_legs = new RendererModel(this);
        right_legs.setRotationPoint(0.0F, 24.0F, 0.0F);
        

        right_leg1 = new RendererModel(this);
        right_leg1.setRotationPoint(1.5F, -4.0F, -1.0F);
        right_legs.addChild(right_leg1);
        setRotationAngle(right_leg1, 0.0F, -0.2618F, -0.4363F);
        right_leg1.cubeList.add(new ModelBox(right_leg1, 38, 46, -14.0F, -4.0F, 0.0F, 8, 2, 2, 0.0F, false));

        right_leg2 = new RendererModel(this);
        right_leg2.setRotationPoint(1.5F, -4.0F, -1.0F);
        right_legs.addChild(right_leg2);
        setRotationAngle(right_leg2, 0.0F, 0.0873F, -0.4363F);
        right_leg2.cubeList.add(new ModelBox(right_leg2, 18, 46, -14.0F, -4.0F, 0.0F, 8, 2, 2, 0.0F, false));

        right_leg3 = new RendererModel(this);
        right_leg3.setRotationPoint(1.5F, -4.0F, -0.5F);
        right_legs.addChild(right_leg3);
        setRotationAngle(right_leg3, 0.0F, 0.3491F, -0.4363F);
        right_leg3.cubeList.add(new ModelBox(right_leg3, 43, 35, -14.0F, -4.0F, 0.0F, 8, 2, 2, 0.0F, false));

        left_legs = new RendererModel(this);
        left_legs.setRotationPoint(0.0F, 24.0F, 0.0F);
        

        left_leg4 = new RendererModel(this);
        left_leg4.setRotationPoint(-1.5F, -4.0F, -1.0F);
        left_legs.addChild(left_leg4);
        setRotationAngle(left_leg4, 0.0F, 0.2618F, 0.4363F);
        left_leg4.cubeList.add(new ModelBox(left_leg4, 0, 43, 6.0F, -4.0F, 0.0F, 8, 2, 2, 0.0F, false));

        left_leg5 = new RendererModel(this);
        left_leg5.setRotationPoint(-1.5F, -4.0F, -1.0F);
        left_legs.addChild(left_leg5);
        setRotationAngle(left_leg5, 0.0F, -0.0873F, 0.4363F);
        left_leg5.cubeList.add(new ModelBox(left_leg5, 40, 27, 6.0F, -4.0F, 0.0F, 8, 2, 2, 0.0F, false));

        left_leg6 = new RendererModel(this);
        left_leg6.setRotationPoint(-1.5F, -4.0F, -0.5F);
        left_legs.addChild(left_leg6);
        setRotationAngle(left_leg6, 0.0F, -0.3491F, 0.4363F);
        left_leg6.cubeList.add(new ModelBox(left_leg6, 21, 18, 6.0F, -4.0F, 0.0F, 8, 2, 2, 0.0F, false));
    }

    @Override
    public void render(Entity entity, float f, float f1, float f2, float f3, float f4, float f5) {
        body.render(f5);
        right_claw.render(f5);
        left_claw.render(f5);
        right_legs.render(f5);
        left_legs.render(f5);
    }

    public void setRotationAngle(RendererModel modelRenderer, float x, float y, float z) {
        modelRenderer.rotateAngleX = x;
        modelRenderer.rotateAngleY = y;
        modelRenderer.rotateAngleZ = z;
    }
}