Java lambda expression [memo]

I tried a lambda expression that can be used from java8.

`demojava/demo9/Demo9.java`


package demojava.demo9;

interface Rtest{
	public abstract String Res(Integer x,Integer y );
}

public class Demo9 {

	public static void main(String [] args) {
		
		Rtest rtest = (x,y)->{
			return "(" + x + ","+ y + ")\n\n";
		};
		
		System.out.println(rtest.Res(10,20));
	}
	
}

Execution result

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