Adding a potion effect when you step on a block

yeah. you can do that.

/execute @a ~ ~ ~ detect something..

to finish the command:
/execute @a ~ ~ ~ detect ~ ~-1 ~ minecraft:<block> 0 /effect @p minecraft:<effect> <time> <Level> <hide particles, true/false>

or you set the block to the id what are you using in the mod. dadaaa.a.

Vanilla, plugin, mod?

I'm talking about java coding

This doesn't work for modding, anyone know how I can do this, or if not, where I should ask besides here?

I am using eclipse for this if that helps at all: Please help! I know there is a way to mod a block to give you a potion effect when you or a mob steps on it, but what is it?

Probably some sort of "if" statement.

public void onEntityWalking(World par1World, int par2, int par3, int par4, Entity par5Entity) {
if (par5Entity instanceof EntityLiving) {
((EntityLiving) par5Entity).addPotionEffect(new PotionEffect(Potion.heal.getId(), 50, 1));
}
}

To break it down...
if (par5Entity instanceof EntityLiving) {
This simply checks if the entity walking on it is alive, not dead.

((EntityLiving) par5Entity).addPotionEffect(new PotionEffect(Potion.heal.getId(), 50, 1));
That just adds the effect to the entity, simple!

The second integer is the duration of the potion in ticks, and the third is the amplifier.

Just replace 'heal' with one of these:


Seriously... 8 days? Nobody?
Has anyone else ever even tried to mod minecraft before?