java-interview.java

import java.io.*;

public class HelloWorld {
    static class Foo {
        public int x;
        public Foo(int in)
        {
            x = in;
        }
    }
	
    @FunctionalInterface
    interface Accumulator {
	int accumulate(int input);
    }
	
    @FunctionalInterface
    interface Processor {
	void process(Foo input);
    }
    public static void main(String []args) {
        //
        Accumulator a = input -> input + 1;
	System.out.print(a.accumulate(5));
	
	//
	Foo foo = new Foo(5);
	Processor p = f -> f.x += 1;
	p.process(foo);
	System.out.print(foo.x);
	
	//
	a.accumulate(foo.x);
	System.out.print(foo.x);
    }
}