//Method Reference Example(Alternative Approach of Lambda Expression)

package methodconstructorreference;

public interface Interf
{
public void m1();
}



package methodconstructorreference;

public class Test {
public static void main(String[] args) {

//m1() implementation provide through lambda expression
Interf i=()->
{
System.out.println("lambda implementation");
};
i.m1();
}
}


o/p:-------------------------------------

lambda implementation




=======================================================================================================================

package methodconstructorreference;

public interface InterfMethodReference {
public void m1();
}


package methodconstructorreference;

public class TestMethodRef {


public static  void m2()
{
System.out.println("method reference");
}
public static void main(String[] args) {

InterfMethodReference imr=TestMethodRef::m2;
imr.m1();
}


}


o/p:------------------------
method reference


=========================================================================================================================================

package methodconstructorreference;

public class TestRunnable {
public static void main(String[] args) {
Runnable r=()->
{
for(int i=0;i<10;i++)
{
System.out.println("child thread");
}
};
Thread t=new Thread(r);
t.start();
for(int i=0;i<10;i++)
{
System.out.println("main thread");
}
}

}


o/p:------------
mixed output


==========================================================================================================================================


package methodconstructorreference;

public class TestRunnableMethodReference {



public void m1()
{
for(int i=0;i<10;i++)
{
System.out.println("child Thread");
}
}
public static void main(String[] args) {
TestRunnableMethodReference trm=new TestRunnableMethodReference();
Runnable r=trm::m1;
Thread t=new Thread(r);
t.start();
for(int i=0;i<10;i++)
{
System.out.println("main Thread");
}
}

}


o/p:-------
mixed output
========================================================================
                                                //Constructor Reference Example

package methodconstructorreference;

public class Sample {
Sample()
{
System.out.println("sample constructor execution and object creation");
}
      }


package methodconstructorreference;

public interface ConstructorReferenceInterf {

public Sample get();

}




package methodconstructorreference;

public class ConstructorReferenceDemo {
public static void main(String[] args) {
//Through lambda expression
/* ConstructorReferenceInterf cri=()->
{
Sample s=new Sample();
return s;
};
Sample s1=cri.get();*/

     //Through Constructor Reference
ConstructorReferenceInterf cri=Sample::new;
Sample s=cri.get();


}

}



o/p:---------------------

sample constructor execution and object creation