What is Constructor in Java?

Asked by Last Modified  

8 Answers

Learn Java

Follow 0
Answer

Please enter your answer

Teacher

A constructor in is a block of code similar to a method that's called when an instance of an object is created.
Comments

Tutor

Constructor is type of methods which will only execute at the time of object creation. we can create more than one constructor in same class file and this concepts called constructor overloading. if in class, no constructor is defined then compiler automatically create one for that class which will be...
read more
Constructor is type of methods which will only execute at the time of object creation. we can create more than one constructor in same class file and this concepts called constructor overloading. if in class, no constructor is defined then compiler automatically create one for that class which will be without parameter. read less
Comments

Java Classes

Constructor will be similar to a method with no return type and called when a instance of object is created
Comments

Constructor definition is same as method but if no constructor is defined the JVM will create a default constructor to that class while complation time. This constructor is executed automatically with instance of object
Comments

Digital Marketing

constructor is also used to define a run time memory allocation to the instance of class
Comments

Java Trainer with 8 years of Realtime Development Experience

1. Constructor is just like a method ( referred as special method as it appearance look like normal methods) 2. It's name is same as class name 3. It doesn't return any value 4. It is invoked/called automatically/implicitly when the object is instantiated/created. Use of Constructor ---------------------------- It...
read more
1. Constructor is just like a method ( referred as special method as it appearance look like normal methods) 2. It's name is same as class name 3. It doesn't return any value 4. It is invoked/called automatically/implicitly when the object is instantiated/created. Use of Constructor ---------------------------- It is used to initialize instance variables read less
Comments

Java constructors are special methods that are called when an object is instantiated. code that allows you to create new objects from a class. Allows code to initialize data. A default constructor without any argument is automatically created when we do not define any constructor .
Comments

IT Professional Trainer with 11 years of Experience in IT Industry and Certified AWS Trainer

Constructor in java is used to initialize the object with its default value.Initialize is required because to avoid garbage values stored in objects.
Comments

View 6 more Answers

Related Questions

hat is java
Java is high level programming language. Java is platform independent and robust.
Narendra
0 1
8
Can u explain init() method is used in servlet for initialization then constructor also there for initializing variables.then what makes the difference between init() and default constructor in servlets?
Using init() only advisable than default constructor because we cannot initialize servlet using constructor because servlets are not directly instantiated by javacode, instead container create instance...
Anwar
Is it really needed to do Java training before graduation, to get a job?
Yes, It's must to get better opportunities and to standard alone in IT field. Not only core Java but also learn Spring,Hinernat ,Struts. ANGULARJS add an advantage to get job easily.
Udaybhan
Who can provide good Java training with real-time but not institute?
If you reside in pune then i can provide real time programming in java . So you will get to know industry based java programming
Sridevi
0 0
6
Which is a good Java training and placement institute for a fresher in Bangalore?
I know an institute in HYderabad which is giving 100% job guarantee or 100% fee refund. They have office in bangalore also, not sure whether they are offering this program in Bangalore. Please visit their...
Raja
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Java Hash Map internal implementation
1.Hash Map internal implementation: In hash map it will create an array of table (to store the {Key,Value} pair) which is of type java.util.HashMap.EntryThe Entry object contains {hash, key, next, value}...
R

Create Immutable Class
Snippet of an Immutable Class: package com.stringhr; /*Declare the class as 'final'. This would prevent any other class from extending it and hence from overriding any method from it which could modify...

Java 8 Predicates
In the previous lession, we have learnt how to use filters and collectors. In filter we have passed the condition to evaluate whether the object is eligible to be filtered or not. Code given below for...

Method Overloading vs Method Overriding
1. Method Overloading: Method overloading means a same method with same name can have different implementations/body by changing one of the follwing thing: 1) Number of Parameters 2) Order of Parameters 3)...

Android : Application Launch time improvements.
For any standard android application, below 3 components play important roles to show 1st interface to user, so that he/she can interact with the app. 1. Custom Application class : Intialize the components...

Recommended Articles

Java is the most famous programming language till date. 20 years is a big time for any programming language to survive and gain strength. Java has been proved to be one of the most reliable programming languages for networked computers. source:techcentral.com Java was developed to pertain over the Internet. Over...

Read full article >

Designed in a flexible and user-friendly demeanor, Java is the most commonly used programming language for the creation of web applications and platform. It allows developers to “write once, run anywhere” (WORA). It is general-purpose, a high-level programming language developed by Sun Microsystem. Initially known as an...

Read full article >

Java is the most commonly used popular programming language for the creation of web applications and platform today. Integrated Cloud Applications and Platform Services Oracle says, “Java developers worldwide has over 9 million and runs approximately 3 billion mobile phones”.  Right from its first implication as java 1.0...

Read full article >

In the domain of Information Technology, there is always a lot to learn and implement. However, some technologies have a relatively higher demand than the rest of the others. So here are some popular IT courses for the present and upcoming future: Cloud Computing Cloud Computing is a computing technique which is used...

Read full article >

Looking for Java Training Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you