public void onPoweredBlockChange(World world, int i, int j, int k, boolean flag)
    {
        if(world.multiplayerWorld)
        {
            return;
            
        } else
        {
           float f = 5F;
           world.createExplosion(null, i, j, k, f);
            return;
        }
    }

float f = 5F;

world.createExplosion(null, i, j, k, f);

public void onNeighborBlockChange(World world, int i, int j, int k, int l)
    {
        int i1 = world.getBlockMetadata(i, j, k);
        if((i1 & 8) != 0)
        {
            if(world.getBlockId(i, j - 1, k) != blockID)
            {
                world.setBlockWithNotify(i, j, k, 0);
            }
            if(l > 0 && Block.blocksList[l].canProvidePower())
            {
                onNeighborBlockChange(world, i, j - 1, k, l);
            }
        } else
        {
            boolean flag = false;
            if(world.getBlockId(i, j + 1, k) != blockID)
            {
                world.setBlockWithNotify(i, j, k, 0);
                flag = true;
            }
            if(!world.isBlockNormalCube(i, j - 1, k))
            {
                world.setBlockWithNotify(i, j, k, 0);
                flag = true;
                if(world.getBlockId(i, j + 1, k) == blockID)
                {
                    world.setBlockWithNotify(i, j + 1, k, 0);
                }
            }
            if(flag)
            {
                if(!world.multiplayerWorld)
                {
                    dropBlockAsItem(world, i, j, k, i1);
                }
            } else
            if(l > 0 && Block.blocksList[l].canProvidePower())
            {
                boolean flag1 = world.isBlockIndirectlyGettingPowered(i, j, k) || world.isBlockIndirectlyGettingPowered(i, j + 1, k);
                onPoweredBlockChange(world, i, j, k, flag1);
            }
        }
    }