Constructors in Java Example-
What are Constructors?
In Java, a constructor is a special type of method that is invoked when an object is instantiated or created. The purpose of a constructor is to initialize the state of an object. Constructors are defined within the class and have the same name as the class.
- Default Constructor: If no constructor is defined in a class, Java will provide a default constructor without any parameters.
Example:
// Default Constructor Example
package Constructors;
public class ConstructorsExample2 {
ConstructorsExample2()
{
System.out.println(“Default Constructor”);
}
public static void main(String[] args) {
ConstructorsExample2 a= new ConstructorsExample2();
}
}
2. Parameterized Constructor: Constructors can be initialized with parameters, allowing for various ways of initializing objects based on the provided values.
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//Parameterized Constructor
package Constructors;
public class ParameterizedConst {
ParameterizedConst(String name)
{
System.out.println(“This is single argument:”+name);
}
ParameterizedConst(String name, int age)
{
System.out.println(“This is single argument:”+name+” “+age);
}
public static void main(String[] args) {
ParameterizedConst p = new ParameterizedConst(“RamaKrishnana”);
ParameterizedConst p1 = new ParameterizedConst(“Talishka”,90);
}
}
