import java.math.BigInteger;

/**

* Demonstates uses of objects and wrappers.

*/

public class Objects {

public static void main(String[] args) {

// primitives vs objects

int number = -2;

char symbol = '!';

char[] array = {'c', 'a', 't'};

String word = "dog";

// Strings are immutable

String name = "Alan Turing";

String upperName = name.toUpperCase();

String text = "Computer Science is fun!";

text = text.replace("Computer Science", "CS");

// Wrapper classes

Integer x = new Integer(123);

Integer y = new Integer(123);

if (x == y) { // false

System.out.println("x and y are the same object");

}

if (x.equals(y)) { // true

System.out.println("x and y have the same value");

}

String str = "12345";

int num = Integer.parseInt(str);

num = 12345;

str = Integer.toString(num);

// BigInteger arithmetic

long z = 17;

BigInteger big = BigInteger.valueOf(z);

String s = "12345678901234567890";

BigInteger bigger = new BigInteger(s);

BigInteger a = BigInteger.valueOf(17);

BigInteger b = BigInteger.valueOf(1700000000);

BigInteger c = a.add(b);

}

}