#54 Access Modifiers in Java

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In this lecture we are discussing:
1)What is Access Modifiers ? Types of access Specifiers
2)How to use with example
#1
What is Access Modifiers ? Types of access Specifiers
-- Access Modifiers are keywords that determine the visibility and access level of a class,
method, or data member.
-- There are four types of access specifiers in Java:
i) public: A public class, method, or data member is visible to all classes.
ii) protected: A protected class, method, or data member can be accessed by classes within the same
package, and any subclasses which extend the class.
iii) default: A default class, method, or data member is visible only to classes
within the same package.
iv) private: A private class, method, or data member is only visible to the class it is declared in,
and not to any subclasses.
#2
package flder1.folder1;
// import flder1.folder2.B; --The type flder1.folder2.B is not visible because class is not public
import flder1.folder2.C;
public class A {
public static void main(String []args){
// B obj=new B(); -- we was not making class B as public -- so we get error
C obj =new C(); //since, Class C is public so we can use outside the package of folder2
//for class visibility only public is legal modifiers has been used and if you not mention anything by default class is default.
// System.out.println(obj.def); -- The field C.def is not visible because we want to access from different package but we have not visibility in current package because access specifier is default
// System.out.println(obj.prot); not visible because access specifier is protected -- it is only visible in same package or visible in other package if class is subclass of that class.
//protected visible to inherited class of different package also.
Child ch =new Child();
// ch.a; -- not visible in anywhere. Since a is visible only in same class because it is private.
}
}
class Child extends C{
private int a=9;
public void natureProtected(){
System.out.println(prot); //here we can use protected variable becuase it is visible to inherited class in different package also
}
}
/*
step 1: create a folder flder1
Step 2: create two sub folder inside flder1 i) folder1 ii)folder2
step 3: create A.java file in folder1
step 4: create B.java, C.java in folder2
package flder1.folder2;
class B {
}
package flder1.folder2;
public class C {
int def=5;
protected int prot=6;
public int pub=7;
private int pvt=8;
}
*/
Note : Remember visibility decrease in order
public--protected--default(but this keyword not mentioned like public and private)--private
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[@user-qz6ux8gb8u]

Continuing same example for every video is little bit confusing so that we have to watch 12 hours video

[@MykytaStr]

Nice explanation. The table helped a lot

[@SohailAhmad-xk2tx]

Thanks sir for clear concepts ❤

[@Cablur]

Great video, thank you!
I think it would be more accessible if you had stuck to the same example but only switching the modifiers.

[@sidiqmoltafet8482]

Thank you for keeping it so simple! Watched a few other videos and was confused this was great!

[@SmartAITutorials]

Best as Always 🎉

[@ontime001]

Thanks Navinji

[@dProfessor_]

SUPERB

[@madhumukkera3343]

sir , package line is note coming when i move a file to a folder

[@justfun8525]

thank you sir you are gem

[@madhumukkera3343]

sir , tell the extention you are using

[@user-bc2qf9me6m]

How it Will Compile When .java Files are in Different Folder

[@sudhanshugorwadkar3839]

Can classes be declared as protected?

[@attrey273]

default- can be accesed in same package
cant have 2 public class in same file

[@Noname-qf3yk]

best teacher

[@AnjaliYadav-ex6kw]

Good Evening Sir
Sir I have interview on java so can u help me sir so that i can crack it easily

[@BabuRao-vb5bo]

what Ide do you use sir

[@287_shaikhmustafa7]

Visual studio

[@jyotidhananjay7233]

Sir please explain about
Void and return

[@milanpronic9424]

void metods cant not use return, you can print only with System.out.println
but with a metode like public double/boolean/int you must use return

[@boopathirajagopalan3047]

The presentation of the folder package is not clear. Why are you keep rushing. Not suitable for beginners. Only guys who knows Java already can understand

[@AmitMishra_108]

Please speak clear and little bit slow

[@user-we4jz3qx7c]

I did not understand anything