/* Wrapper classes in Java... see java.lang in API:
   Boolean: Boolean(boolean b), new Boolean(String s), booleanValue()
   Integer: Char(char c), charValue()
   Double:  Double(double d), Double(String s), doubleValue()
   see also Number, BigDecimal, BigInteger, Byte, Long, Float, Short
*/


public class Wrappers {

    public static void main(String[] args) {

	Integer o1 = new Integer(4);
	Integer o2 = new Integer(4);
	if (o1.equals(o2))
	    System.out.println("hooray for wrappers!");

	int i1 = o1.intValue();
	int i2 = o2.intValue();
	if (i1==i2)
	    System.out.println("hooray for base types!");

    }

}

/* output: 
   hooray for wrappers!
   hooray for base types!
*/