How do you execute code when a block is placed

I want it to check if a sign has a anticancer string in it. But what is the santax to start executing code when a block (sign) is placed.

 

Take a look at the Event API reference. Basically, you register Listeners for various types of Events (in this case, you'd want to listen for BlockPlaceEvents), and react appropriately to these Events depending on what you want to do.

 

Can you give me an example of code with the sign included? So like when someone places a sign enters text then it executes code

 

In your onEnable:

Code:java

this.getServer().getPluginManager().registerEvents(this, this);

Anywhere in your main class:

Code:java

@EventHandler
public void onPlace(SignUpdateEvent event) {
Sign sign = (Sign) event.getBlock().getState();
if(sign.getLine(0).equalsIgnoreCase("gomeow") {
//code to be ran if the top line was gomeow.
}
}

Make sure you import org.bukkit.block.sign not org.bukkit.material.sign!

 

Thank you so much

 

SignUpdateEvent... SignChangeEvent?

 

Remeber if you have changed the lines in the Sign when it's placed. You have to update it.

 

Yes, I was going out of memory, haven't done too much with signs

 

You don't need to access the Sign object, you can (and should) just use the methods on the event object.