What does Install Install Handler mean in Eclipse?

Question

In Eclipse, when you configure an external tool (Run-> External Tools-> External Tools Configurations ...), namely Ant Build, on the Main tab, there is a checkbox "Install input handler". This is checked by default.

What does it do? When do you want to uncheck and what are the benefits?

Answer 1

I believe this is when you use input Ant. A task that InputHandler may need.

When a task wants to ask the user for input, it doesn’t just read the input from the console, as this makes it impossible to embed Ant in the IDE .
Instead, it requests an implementation of the org.apache.tools.ant.input.InputHandler interface to request the user and pass the request back to the user.