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JavaInterviewPoint

Java Development Tutorials

Parameterized Constructor in Java with Example

January 29, 2016 by javainterviewpoint Leave a Comment

A Constructor which has parameters in it called as Parameterized Constructors, this constructor is used to assign different values for the different objects.  In the below example we have a constructor for the Car class which takes in the the value and sets to the property, lets try to set the value for the property "carColor" … [Read more...]

Spring Autowiring constructor Example

January 11, 2016 by javainterviewpoint Leave a Comment

In this article lets take a look into Autowiring by constructor, This type of Autowiring is similar to Autowiring byType , but type applies to constructor arguments. Spring framework tries to match the arguments of the Constructor to the bean type in the configuration file, If a bean is found then Spring injects the object. If not found then it will throw exception. … [Read more...]

Autowiring in Spring

January 4, 2016 by javainterviewpoint Leave a Comment

We have already learnt how to declare Spring beans and inject bean using <property> (Setter Injection) and <constructor-arg> (Constructor Injection) in the XML configuration file. Autowiring is a feature of Spring framework which lets you to Inject Dependency implicitly. Basically it will be using internally using Setter Injection / Constructor … [Read more...]

Java Constructor.newInstance() method Example

October 2, 2015 by javainterviewpoint 1 Comment

In my previous article we have seen how to use Class.newInstance() method in creating object for class dynamically but there exist a problem the newInstance() method of Class class can invoke only no-arg constructor of the class when a class has parameterized constructors we cannot use newInstance() method of Class class at that place we need to go for the newInstance() method … [Read more...]

Java – Constructor in an Interface?

July 31, 2015 by javainterviewpoint Leave a Comment

This is one of the frequently asked interview question. No, We cannot have a Constructor defined in an Interface. A method in a interface will be public and abstract by default to provide 100% abstraction and the implementation(method body) will be provided by the implementing class.In this article we will get to know why Constructors are not allowed in Interface.  … [Read more...]

Java Constructor Chaining with example

July 29, 2015 by javainterviewpoint 2 Comments

Constructor Chaining is nothing but calling one Constructor from another. We will be using this keyword and super keyword in calling a constructor. this can be used to call a constructor within the same class whereas super can be used to call the constructor of the Parent class. … [Read more...]

Constructor in Java and Types of Constructors in Java

July 20, 2015 by javainterviewpoint Leave a Comment

Constructor is a special method in Java which is used to initialize the object. It looks like a normal method however it is not. A normal java method will have return type whereas the constructor will not have an explicit return type. A constructor will be called during the time of object creation (i.e) when we use new keyword follow by class name. … [Read more...]

Java Basics

  • JVM Architecture
  • Object in Java
  • Class in Java
  • How to Set Classpath for Java in Windows
  • Components of JDK
  • Decompiling a class file
  • Use of Class.forName in java
  • Use Class.forName in SQL JDBC

Oops Concepts

  • Inheritance in Java
  • Types of Inheritance in Java
  • Single Inheritance in Java
  • Multiple Inheritance in Java
  • Multilevel Inheritance in Java
  • Hierarchical Inheritance in Java
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  • Types of Polymorphism in java
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  • Can we Overload static methods in Java
  • Can we Override static methods in Java
  • Java Constructor Overloading
  • Java Method Overloading Example
  • Encapsulation in Java with Example
  • Constructor in Java
  • Constructor in an Interface?
  • Parameterized Constructor in Java
  • Constructor Chaining with example
  • What is the use of a Private Constructors in Java
  • Interface in Java
  • What is Marker Interface
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Java Keywords

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Miscellaneous

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  • How does Hashmap works internally in Java
  • Java Ternary operator
  • How System.out.println() really work?
  • Autoboxing and Unboxing Examples
  • Serialization and Deserialization in Java with Example
  • Generate SerialVersionUID in Java
  • How to make a class Immutable in Java
  • Differences betwen HashMap and Hashtable
  • Difference between Enumeration and Iterator ?
  • Difference between fail-fast and fail-safe Iterator
  • Difference Between Interface and Abstract Class in Java
  • Difference between equals() and ==
  • Sort Objects in a ArrayList using Java Comparable Interface
  • Sort Objects in a ArrayList using Java Comparator

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Useful Links

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