WrapperClass.java

/*
 Java is not 100% OOP because it can have primitive type variables like int float etc
 but wrappper class gives a solution. instead of creating primitive variables. we can store our
data into wrapper classes. 
for eg 
Integer is a wrapper class which stores int values . But since Integer is a class not primitive variabele
hence we can say that now every things is object
*/
package wrapper.pkgclass;


public class WrapperClass {

 public static void main(String[] args) {
 // static function present in each wraper class
 // takes input as integer and saves as integer 
 // return reference of Integer class
 Integer in= Integer.valueOf("88");
 //similary
 Float f=Float.valueOf("5.55");
 
 //static funtion to convert string to corresponding types
 int i=Integer.parseInt("22");
 //similarly
 double d=Double.parseDouble("4.3");
 
 //instance function that returns value stored in Integer class
 int a =in.intValue();
 }
 
}
class Wrapperclass
{
	public static void main(String args[])
	{
		// static function present in each wraper class
	 String a="123";
	 Integer i=Integer.parseInt(a); //creating a wrapper class object
	 //this will convert the string into the corresponding type

	 if(a.equals("123"))
	 {
	 System.out.println("Equals");
	 }
	 else
	 {
	 System.out.println("Not equals");
	 }

	 if(i==(123))
	 {
	 	 System.out.println("Print");
	 }
	 else
	 {
	 	 System.out.println("Not Print");
	 }
	}
}