What are the 'Java Data Types' and 'Access Modifiers' ???? 🤔


Java Data Types.

āļ¯āļ­්āļ­ āļœāļļāļŠා āļšāļģ āļ­āļļා āļœැāļąීāļ¸āļ§ āˇ„ැāļšි  āļ†āļšාāļģāļēේ āļ¯ේ⎀āļŊ් Data Types āļŊෙ⎃ ⎄ැāļ¯ිāļą්⎀ේ. Java Language āļ‘āļšෙ⎄ි āļ´්‍āļģāļ°ාāļą āˇ€āˇāļēෙāļą් Data Types 8āļš් āļ¯ැāļšිāļē ⎄ැāļš. āļ’⎀ා Primitive Data Types  āļŊෙ⎃ ⎄ැāļ¯ිāļą්⎀ේ. āļ’⎀ා  āļŊෙ⎃, 

  1. byte  - (Byte)   :- Numerical Value
  2. short - (Short)  :- Numerical Value
  3. int - (Integer)  :- Numerical Value
  4. long - (Long)  :- Numerical Value
  5. float - (Float)  :- Numerical Value
  6. double - (Double)  :- Numerical Value
  7. boolean - (Boolean)  :- True / False  
  8. char - (Char)  :- Character  
āļ´ෙāļą්⎀ා āļ¯ිāļē ⎄ැāļš. āļ¸ීāļ§ āļ…āļ¸āļ­āļģ⎀ Java Language āļ‘āļšෙ⎄ි String āļąැāļ¸ැāļ­ි class āļ‘āļšāļš් āļ‡āļ­ි āļ…āļ­āļģ āļ‘āļē āļ¸āļœිāļą් āļ¯, Characters āļœāļļāļŠා āļšāˇ… ⎄ැāļšිāļē. āļąāļ¸ුāļ­් āļ‘āļē Primitive Data Type  āļ‘āļšāļš් āļąො⎀āļą āļ…āļ­āļģ āļ‘āļē Non - Primitive Data Type āļ‘āļšāļš් ⎀ේ.

  • NUMBER SYSTEM 
Number System āļ‘āļšāļš් āļēāļąු ⎃ංāļ›්‍āļēා āļ´āļ¯්āļ°āļ­ිāļēāļš්  ⎀ේ.

Ex :-  Binary , Decimal , Octal , Hexadecimal

Binary - 1 1 1 1 1 1 1 1 2

āļ‰āˇ„āļ­ āˇƒāļ¯āˇ„āļą් āļ¯්⎀ිāļ¸āļē ⎃ංāļ›්‍āļēා āļ´āļ¯්āļ°āļ­ිāļēෙ⎄ි āļ‘āļą 1 āļēāļą āļ‘āļš āļ‰āļŊāļš්āļšāļ¸āļš්  Bit - 1 āļŊෙ⎃ ⎄ැāļ¯ිāļą්⎀ිāļē ⎄ැāļšිāļē. 

  • Data Values
8 Bit = 1 Byte
1024 Byte = 1KB
1024 KB = 1 MB
1024 MB = 1 GB
1024 GB = 1 TB 



Access Modifiers



Class / Method / Variable āļ‘āļšāļšāļ§ Access  āļšāļģāļą්āļą āļ¯ෙāļą Security āļ‘āļš Modify āļšිāļģීāļ¸āļ§ āļēොāļ¯ා āļœāļą්āļąා āļ¯ේ⎀āļŊ් Access Modifiers  ⎀ේ. Java Language āļ‘āļšෙ⎄ි Access Modifiers ⎀āļģ්āļœ 4 āļ¯ැāļšිāļē ⎄ැāļšිāļē. āļ‘āļąāļ¸්, 
  • Public
  • Private
  • Protected
  • Default


Ex: - 
  • public class Chamath {    }  
  • protected class Chamath {    }
  • private class Chamath {    }
  • class Chamath {    }                          - (Use as Default )

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