What is the output of this program?

class Output {
    public static void main(String args[])
    {
        Integer i = new Integer(257); 
        byte x = i.byteValue(); 
        System.out.print(x);
    }
}

1. 0
2. 1
3. 256
4. 257

What is the output of this program ?

class Output
{
    public static void main(String args[]) 
    { 
        Integer i = new Integer(514);
        float x = i.floatValue(); 
        System.out.print(x);
    }
}

1. 0
2. 1
3. 257
4. 514.0

Name the numeric wrapper classes in Java.

What is the need of wrapper classes when there are primitive datatypes ?