JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Method Reference - Reference to a Constructor example.


This page shows a simple example of Method Reference feature of reference to a construtor:

package com.java2novice.methodreference;

import com.java2novice.lambda.Employee;

public class ConstructorRefEx {

	public static void main(String a[]) {

		EmployeeFactory empFactory = Employee::new;
		Employee emp = empFactory.getEmployee("Nataraja G", "Accounts", 8000);
		System.out.println(emp);
	}
}

Here is EmployeeFactory class:

package com.java2novice.methodreference;

import com.java2novice.lambda.Employee;

public interface EmployeeFactory {

	public abstract Employee getEmployee(String name, String account, Integer salary);
}

Here is Employee POJO class:

package com.java2novice.lambda;

public class Employee {

	private String name;
	private String account;
	private Integer salary;

	public Employee(String name, String account, Integer salary) {
		super();
		this.name = name;
		this.account = account;
		this.salary = salary;
	}

	@Override
	public String toString() {

		return "name: "+ this.name +" | account: "+ this.account +" | salary: "+this.salary;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getAccount() {
		return account;
	}

	public void setAccount(String account) {
		this.account = account;
	}

	public Integer getSalary() {
		return salary;
	}

	public void setSalary(Integer salary) {
		this.salary = salary;
	}
}

Output:
name: Nataraja G | account: Accounts | salary: 8000
<< Previous Program 

Java-8 Method References Examples

  1. Method Reference - Reference to a Static Method example.
  2. Method Reference - Reference to a Instance Method example.
  3. Method Reference - Reference to a Constructor example.
Knowledge Centre
doPost Vs doGet methods
doGet() method is used to get information, while doPost() method is used for posting information. doGet() requests can't send large amount of information and is limited to 240-255 characters. However, doPost()requests passes all of its data, of unlimited length. A doGet() request is appended to the request URL in a query string and this allows the exchange is visible to the client, whereas a doPost() request passes directly over the socket connection as part of its HTTP request body and the exchange are invisible to the client.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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