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Constructors in Java

216 views · Published 1 February 2014 · 2:35 · Indexed 4 November 2026

Channel: Interview DOT · 2014 · Science & Technology

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Constructor in Java:
Constructor in Java ? Java Interview Question And Answer ?

Constructors in Java :

1.Constructor in Java is block of code which is executed at the time of Object creation.

2.Constructor is entirely different than methods and has some specific properties like name of constructor must be same as name of Class.

3.Constructor also can not have any return type, constructor's are automatically chained by using this keyword and super.

4.Object initialization code is normally placed in Constructor.

5.We can overload constructors using different parameters.

6.Every Class in Java has constructor, if no explicit constructor is specified by Programmer, Java Compiler inserts a no argument constructor inside class. This is also called default Constructor in Java

7.Calling one constructor from another constructor in Java is called Constructor chaining.

8.You can use any access modifier with Java constructor. they can be public, protected or private.

9.Constructor in Java can not be abstract, static, final or synchronized.

10.Constructor can throw Exception in Java.

11.Constructors are not inherited.
 
12.Private Constructors can be u sed to create "Singleton" pattern.

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