#43 Constructor in Java

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In this lecture we will see:
– What are constructors in Java/
– Properties and use of a constructor
– Syntax of a constructor

#1
– When you create an object then in the heap memory, it will just create a blank object.
– If you do not assign values than the default values will be assigned like:
0 for int,
NULL for string
– We can also define values at the time of the creation of an object by giving our default values.

#2
Properties of a constructor:
– Constructor is almost similar to a method it has a name and it also has round brackets.
– The change in the constructor with respect to the method is that in the constructor we do not specify the return type.
– The name of a constructor must be the same as the class name.
– There is no need to call a constructor. It gets called automatically at the time of the creation of an object.
– At the time of calling the constructor, memory for the object is allocated in the memory.
– Constructors are called only once at the time of object creation. While method(s) can be called any number of times.

#3
Syntax of a constructor:
class human {
public Human()
{
statements;
}
}

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