#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

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.

//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(){
}
}

/*
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

class B {
}
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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[qzuxgbu]

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

[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.

[MykytaStr]

Nice explanation. The table helped a lot

[sidiqmoltafet]

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

[boopathirajagopalan]

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

[madhumukkera]

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

[attrey]

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

[jyotidhananjay]

Sir please explain about

Void and return

[bcqfmem]

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

[madhumukkera]

sir, tell the extention you are using

[AnjaliYadav-exkw]

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

[AmitMishra_]

Please speak clear and little bit slow