[1.7.2]Question to "addPotionEffect"

[MikaXD]

I want to give the player a potion effect and I found this code:

 

player.addPotionEffect(new PotionEffect(int par1, int par2, int par3, boolean par4));

 

What do the 4 arguments mean?

[MikaXD]

If I COULD open this class, I wouldn't ask, what the parameters mean. When I try to open a specific class by holding the mouse over the methode name, eclipse always says, the attached source could not be found or something like that  :'(

 

But thanks for you help!

[MikaXD]

I only ran "gradlew setupDecompWorkspace eclipse".

[MikaXD]

I'll try it again.