#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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[@parthasarathikrishnamoorth3470]

create a individual program for individual conepts don't be continue with the same program, why mean it collapsing for beginners..

[@777_Radha_Krishna_]

If you want to learn constructor please refer the vedio of durga sir they itself not understand the core Java concept.

[@mr.sharingan2945]

nice sir i luv u

[@user-bd6yy6dr1j]

BEST!!!!

[@sridharmurari3007]

Sir, New keyword just creates a obj with default values right? then what is the role of default constructor ?

[@tigersthunder]

After new is the default constructer that java made for u so that u dont have to write it as long as u dont pass any values.

[@JDMon24]

Sir if second object is created then another constructor will called?

[@unknown_abhi538]

Yes not another but that constructor will be called 2 times 1st time by the first obj and 2nd time by the obj1

[@venkateshkankapurkar9065]

namaskaram navingaru

[@mr.sharingan2945]

nice sir

[@roopagaur8834]

We can use methods for parameters then why to use constructor when we can do by method only, please need reply

[@neerajgarg9096]

because if u make method then u need to call them explicitly but in case of constructor they are automatically called (we don't need to call constructor ) when object is created so that's why we use constructor :)

[@roopagaur8834]

@@neerajgarg9096 Thank you

[@puruagni1927]

Why are you not updating VS Code? Please update VS Code.

[@Gamuss12345]

What about private constructors? How can I call it from my main class?

[@samagraagrawal5333]

Constructors can't be private

[@Gamuss12345]

@@samagraagrawal5333 my prof taught me that there are also private constructors in Java

[@shivamKumar-sk6jz]

Sout shortcut is not working in my ide

[@TOP10-sj5gs]

Duvvena undha alien 👽

[@Breakingbadtwd]

Why the age:12 Name: john Not called 2 times when we have 2 objects?

[@SanataniRishu02]

Beacuase in constructor block you are not printing it you are just assigning value so even if it assign value 2 times as there is no system.out.println inside the constructor and print function is called from main class you can see below codes and he is just printing it for 1 object which is obj not obj1 hence only one output

[@user-nm7mu2gw6f]

Sir video for school students pl class9,10

[@raghasudha2357]

not for the begineers...I have seen all his concepts but bit difficukt for begineers to understand

[@mr.sharingan2945]

💔💋💝❤

[@michaelakibira9005]

This I don’t understand

[@divyanshrautela-qn8eb]

worst explaination i have seen on constructors