Check out example codes for "java data types". It will help you in understanding the concepts better.

Code Example 1

Primitive data types are those data types which are used by programmers when creating variables in their program. 
For example :-
    * boolean
    * char
    * byte
    * short
    * int
    * long
    * float
    * double
Non-Primitive data types:
    * String
    * array
    * enum
    * class
    * etc

Code Example 2

/* 
	Java Data Types
There 2 Types Of Data Types In Java
1) Primitive -> byte, char, short, int, long, float, double and boolean.
2) Non-primitive -> (All Classes) -> String, Arrays etc.

Type	Size	Stores
byte	1 byte	whole numbers from -128 to 127
short	2 bytes	"" -32,768 to 32,767
int	    4 bytes	"" -2,147,483,648 to 2,147,483,647
long	8 bytes	""-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
float	4 bytes	fractional numbers; for storing 6 to 7 decimal digits
double	8 bytes	fractional numbers; "" 15 ""
boolean	1 bit	true or false values
char	2 bytes	single character/letter or ASCII values
*/

Code Example 3

Data Type	Size	Stores
byte		1 byte	whole numbers from -128 to 127
short		2 bytes	whole numbers from -32,768 to 32,767
int			4 bytes	whole numbers from -2,147,483,648 to 2,147,483,647
long		8 bytes	whole numbers from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
float		4 bytes	fractional numbers; sufficient for storing 6 to 7 decimal digits
double		8 bytes	fractional numbers; sufficient for storing 15 decimal digits
boolean		1 bit	true or false values
char		2 bytes	single character/letter or ASCII values

Code Example 4

Primitive types are the most basic data types available within the Java language. There are 8: boolean , byte , char , short , int , long , float and double . These types serve as the building blocks of data manipulation in Java. Such types serve only one purpose — containing pure, simple values of a kind.

Code Example 5

/*JavaScript data types*/
//string
var string = 'ASCII text';
//int
var integer = 123456789;
//float
var float = 123.456;
//boolean, can be true or false
var t = true;
var f = false;
//undefined
var undef;//defaults to undefined
var undef = undefined;//not common, use null
//null
var nul = null;
//array
var arr = ['Hello','my','name','is','Dr.Hippo',123,null];
//object
var person = {'name':'John Smith','age':27};
//function
var fun = function(){
    return 42;
}

Code Example 6

<?php
/*
Variables can store data of different types, and different data types can do different things.

PHP supports the following data types:

1) String
2) Integer
3) Float (floating point numbers - also called double)
4) Boolean
5) Array
6) Object
7) NULL
8) Resource
*/
  
// PHP String
$x = "Hello world!";
echo $x;

//PHP Integer
$x = 5985;
var_dump($x);

//PHP Float
$x = 10.365;
var_dump($x);

//PHP Boolean
$x = true;
$y = false;

//PHP Array
$cars = array("Volvo","BMW","Toyota");
var_dump($cars);

//PHP Object
  class Car {
      function Car() {
          $this->model = "VW";
      }
  }

  // create an object
  $herbie = new Car();

  // show object properties
  echo $herbie->model;

//PHP NULL Value
$x = "Hello world!";
$x = null;
var_dump($x);
?>

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