1. Java Programming in Unix
SEEM3460 Tutorial
Java Programming in Unix

2. Code Translation Java source code Java Java compiler bytecode
machine code
for target
machine 1
Bytecode
interpreter
Java
compiler
Java
bytecode
machine code
for target
machine 2
Bytecode
interpreter

3. Compilation and Execution
command > javac Gasmileage.java
generates bytecode: Gasmileage.class
Execution:
command > java Gasmileage
load bytecode: Gasmileage.class
call main of class Gasmileage

4. Structure of A Java Program
// comments about the class
public class MyProgram
class header { }
// comments about the method
public static void main (String[] args)
class body { }
method header
method body

5. New Concepts in Java Code – create a class Holder with main
Class – create a class Coin
Constructor – create method Coin
Methods – create method Coin.flip
Property – during flip, generate random Head=1;Tail=0 as Coin.value (import java.util.Random, nextInt/nextFloat)
Encapsulation – during flip, generate random orientation 0~360 (float) as private variable Coin.orientation
Casting – return integer value of Coin.orientation as read-only property