README.md added and changes made in UsingScanner.java file .

src/README.md

@@ -0,0 +1,84 @@
+#Java Course
+
+##Java basic
+
+### DATA TYPES
+
+There are 8 primitive data types in java :-
+
+1- Byte --> byte (numeric value)
+
+2- Short --> short (numeric value)
+
+3- Char --> char (can be used as for numeric value only character)
+
+4- int --> integer (numeric value)
+
+5- long --> Long (numeric value)
+
+6- float --> Float(numeric value eg : 9.87f)
+
+7- double --> Double(numeric value)
+
+8- boolean --> Boolean ( true and false)
+
+ranges are provided in code of all primitive data types .
+
+## Reference  types in Java:-
+1. class types − This reference type points to an object of a class.
+
+2. array types − This reference type points to an array.
+
+3. interface types − This reference type points to an object of a
+class which implements an interface.
+
+**The main difference between primitive and reference type is that primitive type always has a value, it can never be null but
+reference type can be null, which denotes the absence of value.
+
+##In Java there are four types of references differentiated on the way by which they are garbage collected.
+Strong References.
+
+Weak References.
+
+Soft References.
+
+Phantom References.
+
+
+## NAMING CONVENTIONS IN JAVA
+1: camelCase ( it can be a fields / methods / packages )
+eg: bankAccountNumber
+
+2: PascalCase ( class name)
+eg:  MobileShop
+
+## Scope of a variable
+
+region
+
+it is a part of an program/software where the variable is defined to be accessible .
+
+on the basis of where it is defined :
+- local to a method
+- as a parameter to the method.
+- class variable ( static / class owned )
+- in a different class
+  - local to method 
+
+  - as a parameter
+
+  - class variable
+
+
+## Types of Fields in class ( on the basis of ownership)
+
+1. class variable ( static / class owned )
+2. instance variable ( non-static / object owned )
+
+
+## Accessibility modifiers
+
+1. Private
+2. Public
+3. Protected
+4. Default

src/takingInput/UsingScanner.java

@@ -8,9 +8,12 @@ public class UsingScanner {
      */
     public static void main(String[] args) {
         System.out.println("Enter your name: ");
+        // for single input we can use this .
+        // java.util.Scanner scannerObject = new java.util.Scanner(System.in);
         Scanner scannerObject = new Scanner(System.in);
+        // for taking multiple input using one object e.i scannerObject .
         String inputName = scannerObject.nextLine();
-
+        // int number = scannerObject.nextInt();
         System.out.println("The name is: " + inputName);
     }
 }