codehub27: Using Method References in java 8 part 2:

First two method references are explained in part 1. The link is given below.

Remaining two types are briefly described below.

3.Instance references of a particular object:

This method reference deals with a particular object within the class. To implement this method, use the below code.

Class Object = inst:: memberFunction;

Steps:

· As a beginning, create an interface “Sample” with a void function abc().
· Inside the class InstMethodReference, develop the code for Message().
· In the main function, create an object for the class and using “inst::” to call the instance reference of the object created.

// Java Program to develop instant reference of particular object.

interface Sample {

void abc();

}

public class InstMethodReference {

public void Message() {

System.out.println("This is an instance reference of particular object");

}

public static void main(String[] args) {

InstMethodReference inst = new InstMethodReference();

Sample s = inst::Message;

s.abc();

}

After the code completion, just compile and run the code as follows.

C:\raji\blog>javac InstMethodReference.java

C:\raji\blog>java InstMethodReference

This is an instance reference of particular object

4.Instance Method References of an Arbitrary Object of a Particular Type:

This type of method reference deals with arbitrary object.

Steps:

· Create a class “OtherObjectMethodReference”. Inside main(), create a list “plang” and assign different programming languages.
· Using foreach method, print the list.

import java.util.Arrays;

import java.util.List;

public class OtherObjectMethodReference {

public static void main(String[] args) {

List<String> plang = Arrays.asList("C", "C++", "Java");

plang.forEach(System.out::println);

}

Final step is compile and run the program.

C:\raji\blog>javac OtherObjectMethodReference.java

C:\raji\blog>java OtherObjectMethodReference

C++

Java

These are the ways to implement method references in java8.

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