Method setHardness

src/main/java/net/minecraft/block/Block.java:397–407

Sets how many hits it takes to break a block.

(float hardness)

     * Sets how many hits it takes to break a block.
     */
    protected Block setHardness(float hardness)
    {
        this.blockHardness = hardness;

        if (this.blockResistance < hardness * 5.0F)
        {
            this.blockResistance = hardness * 5.0F;
        }

        return this;
    }

    protected Block setBlockUnbreakable()
    {