changed object types

Author: Alan

DataTypeCateg/ObjectType.java

@@ -0,0 +1,19 @@
+
+import java.util.*;
+public class ObjectType 
+{
+    public static void logLn(Object o){System.out.println(o);}
+
+        public static void main(String[] args)
+        {
+            /**
+             * OBJECT TYPES EXTEND java.lang.Object IMPLICITLY
+             * ARRAYS ARE ALSO OBJECTS
+             */ 
+            List<String> li = new ArrayList<>();
+            li.add("spongebob");
+            li.add("patrick");
+            logLn(li);
+        }
+}
+         

DataTypeCateg/PrimitiveType.java

@@ -1,33 +1,24 @@
-package com.ramo;
+public class PrimitiveType 
+{
+    public static void logLn(Object o){System.out.println(o);}
 
+    public static void main(String[] args)
+    {
+        /**
+         * PRIMITIVE TYPES HAVE WRAPPER CLASSES OBJECT TYPES
+         * boolean : Boolean
+         * byte: Byte
+         * char: Character
+         * short: Short
+         * int: Integer
+         * long: Long
+         * float: Float
+         * double: Double
+         * 
+         */
 
-public class PrimitiveType{
-	public static void main(String [] args) 
-    	{
-		//declaration of variable
-		byte age=26;
-		long viewsCount=123_456_789L;
-		//the l suffix is used to indicate it is a long data type
-      		System.out.println(age);
-      		//by default a decimal is assumed as a double we need the f
-      		//suffix at the end to tell the compiler this is a float
-      		float price=10.99f;
-      		//we always store a char in between single quotes
-      		char letter = 'a';
-      		//we store a str in between double quotes
-      		String myProperty= "This is my property.";
-      		boolean isEligibleForLoan=true;
-      		/*
-      		Date Type Notes:
-		Byte uses 1 byte of memory has a range of: [-128,127]
-		bool uses 1 byte of memory and can store two values only: true/false
-		Short uses 2 bytes of memory and has a range of: [-32000,32000]
-		Integer uses 4 bytes of memory and has a range of: [-2000000000,2000000000]
-		float uses 4 bytes of memory
-		long uses 8 bytes of memory
-		double uses 8 bytes of memory
-		String uses 1 bytes of memory and is notated with double quotes(meaning "Ramo"=4 bytes)
-		char which stands for character takes up 2 bytes of memory and is notated with single quotes(meaning 'a')
-      		*/
-	}
-}
+         int x = 4;
+         logLn(x); //will give us 4
+
+    }
+}