Good Dog
Examine the following declarations.
They use the wrapper class Integer
discussed at the end of chapter 9C.
An Integer
object holds an integer as its data and provides
several useful methods for working with integers.
Class Integer
implements the Comparable<Integer>
interface
and so has the compareTo
method.
Integer minusTen = new Integer( -10 ); Integer minusFive = new Integer( -5 ); Integer five = new Integer( 5 ); Integer ten = new Integer( 10 ); Integer fifteen = new Integer( 15 );
For numbers, mentally replace "compareTo" with subtraction and do the arithmetic.
For example, five.compareTo( ten )
works like five-ten
.
What is the result of each of the following?
Examine the following:
Integer five = 5 ; Integer ten = 10 ;
What is the value of:
five.compareTo( ten )