Java Autobox and Unbox
/*
License for Java 1.5 'Tiger': A Developer's Notebook
(O'Reilly) example package
Java 1.5 'Tiger': A Developer's Notebook (O'Reilly)
by Brett McLaughlin and David Flanagan.
ISBN: 0-596-00738-8
You can use the examples and the source code any way you want, but
please include a reference to where it comes from if you use it in
your own products or services. Also note that this software is
provided by the author "as is", with no expressed or implied warranties.
In no event shall the author be liable for any direct or indirect
damages arising in any way out of the use of this software.
*/
public class ConversionTester {
public static void main(String[] args) {
Integer i = 0;
// Boxing
int foo = 0;
Integer integer = foo;
// Simple Unboxing
int bar = integer;
Integer counter = 1; // boxing
int counter2 = counter; // unboxing
while (true) {
System.out.printf("Iteration %d%n", counter++);
if (counter > 1000) break;
}
Boolean case1 = true;
Boolean case2 = true;
boolean case3 = false;
Boolean result = (case1 || case2) && case3;
Integer i1 = 256;
Integer i2 = 256;
if (i1 == i2) System.out.println("Equal!");
else System.out.println("Not equal!");
Boolean arriving = false;
Boolean late = true;
System.out.println(arriving ? (late ? "It's about time!" : "Hello!") :
(late ? "Better hurry!" : "Goodbye"));
Integer peopleInRoom = 0;
int maxCapacity = 100;
boolean timeToLeave = false;
while (peopleInRoom < maxCapacity) {
if (arriving) {
System.out.println("It's good to see you.");
peopleInRoom++;
} else {
peopleInRoom--;
}
if (timeToLeave) {
do {
System.out.printf("Hey, person %d, get out!%n", peopleInRoom);
peopleInRoom--;
} while (peopleInRoom > 0);
}
}
}
}
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