Wednesday, 16 December 2015

Java Tutorial : Java this keyword (call default constructor)


Click here to watch in Youtube : 
https://www.youtube.com/watch?v=-pZABbc1x10&list=UUhwKlOVR041tngjerWxVccw

Student.java
public class Student
{

    public String name;
    public int age;

    public Student()
    {
        System.out.println("Default constructor is invoked ...");
    }

    public Student(String name, int age)
    {
        /*
         * The this() constructor call can be used to invoke the current class
         * constructor (constructor chaining). This approach is better if you
         * have many constructors in the class and want to reuse that
         * constructor.
         *
         *  Call to this() must be the first statement in constructor.
         */
        this();
        this.name = name;
        this.age = age;
    }

}
StudentTest.java
public class StudentTest
{

    public static void main(String[] args) throws InterruptedException
    {

        Student studentObject = new Student("Peter",25);
        System.out.println("Name : "+studentObject.name);
        System.out.println("age : "+studentObject.age);

    }

}
Output
Default constructor is invoked ...
Name : Peter
age : 25
Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/ThisKeyWordDemoCallDefaultConsApp.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ThisKeyWordDemoCallDefaultConsApp

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/f95cef6f929a55d126484d6f51e7b129a718c586/BasicJava/ThisKeyWordDemoCallDefaultConsApp/?at=master

See also:
  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • All JAVA EE Links
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
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