Java’s interface language feature confuses many Java newbies. ... Empty interface examples include Cloneable, Serializable, and UIResource.

In a previous Java 101 tutorial, you learned how to better organize your code by declaring reference types (also known as classes and interfaces) as members of other reference types and blocks.

There are over 40 functional interfaces listed in the java.util.functions package, which can make the prospect of functional programming in Java ... This restriction doesn’t apply to the Function ...

We can implement macros in Java SE6 with JSR-223. ... One cool feature in JSR-223 is to allow scripts to implement Java interfaces. For example, we wish to implement the ActionListener interface.

java.util.function.UnaryOperator @FunctionalInterface public interface UnaryOperator<T> extends Function<T,T> T apply(T t) Applies this function to the given argument. Parameter Types: T - the input ...

As a result of this, gcc-java does not yet implement 100% of the Java standard. For example, support for the Abstract Window Toolkit (AWT) is not yet complete. ... Investigating libgconf-java, the ...