Use the New Java Interface wizard to create a new Java interface. There are a number of ways to open this wizard:
or
or
or
Click the New button. In the left pane, select Java, and in the right pane, select Interface.
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Select the container where you want the new interface to reside. Then, from the menu bar select File > New > Interface
Creating a top-level interface
Creating a nested interface
Creating a new interface in an existing compilation unit
Renaming a class or interface
New Java Interface wizard
Java Toolbar actions
Package Explorer