A Narrowing conversion

A widening conversion

If our code does not work

Before writing our code

After we are done coding

Read age value from user and store in age variable. Display "too young" message if age value was less than 16. Otherwise, display "too old" message if age value was larger than 32. Otherwise, display "eligible" message.

Read age value from user and store in age variable. Display "too old" message if age value was larger than 32. Otherwise, display "too young" message if age value was less than 16. Otherwise, display "eligible" message.

Read age value from user and store in age variable. Display "eligible" message if age is between 16 and 32. Otherwise, display "too young" message if age value was less than 16. Otherwise, display "too old" message if age value was larger than 32.

It causes a compilation error

It prints the value 100.50

It throws an exception during runtime

It prints the value 200.75

Java programs must be compiled for each specific machine they run on.

Java uses bytecode to allow programs to run on any machine with a JVM.

Java source code is platform-independent.

Java bytecode is tied to a particular platform.

if (isNight == false)

if (!isNight)

if (isNight)

if (!isNight == false)

25

24

-1

0

23

char

String

byte

double

Reader

Printer

Driver

Scanner