JAVA

wrapper classes in java

Wrapper classes: classes that are dedicated to primitives        
Byte, Short, Integer, Long, Float, Double, Character, Boolean
presented in "java.lang" package
AutoBoxing: converting primitive values to wrapper class
		int a = 100;
		Integer b = a  // auto boxing
Unboxing: converting wrapper class value to primitives
		Integer a = 100;
		int b = a;  // unboxing
	int a = 100;
	double b = a;    // none

Java Wrapper Classes

Integer number = new Integer(77);//int
Integer number2 = new Integer("77");//String
Float number3 = new Float(77.0);//double argument
Float number4 = new Float(77.0f);//float argument
Float number5 = new Float("77.0f");//String
Character c1 = new Character('S');//Only char constructor
Character c2 = new Character(1234);//COMPILER ERROR
Boolean b = new Boolean(true);//value stored - true

wrapper classes in java ebhor.com

public class CommandLineArguments {
    public static void main(String[] args) {
        int a = Integer.parseInt(args[0]);
        int b = Integer.parseInt(args[1]);
        int sum = a + b;
        System.out.println("Sum is " + sum);
    }
}