1. Introduction of Java
Fikri Fadlillah, S.T

2. Java Object Oriented Programming Mobile : J2ME, Android
Desktop : JDK, JRE
Enterprise : Java EE
Web : Javascript

3. Java Program public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World"); }

4. How to Compile Java ? Create Compile Execute
Source code with .java extensions
Compile
Typing “javac filename.java"
Execute
Typing “java filename"

5. Java Program - Variable
public class HelloWorld {
public static void main(String[] args) {
int bil_bul4t;
float mc_fl04t;
String karakter;
char abjad; }

6. Java Program - Constant
public class HelloWorld {
public static void main(String[] args) {
int bil_bul4t = ;
float mc_fl04t = 10.4;
String karakter = “java”;
char abjad = ”a”; }

7. Java Program - Operator
public class HelloWorld {
public static void main(String[] args) {
int bil_bul4t;
bil_bul4t = 4+9;
bil_bul4t = 4*9;
bil_bul4t = 4-9; }

8. Java Program - Operator
public class HelloWorld {
public static void main(String[] args) {
int bil_bul4t;
bil_bul4t = 2;
if( bil_bul4t > 2 ) System.out.print(“>2”);
if( bil_bul4t < 2 ) System.out.print(“<2”);
if( bil_bul4t <= 2 ) System.out.print(“<=2”);
if( bil_bul4t >= 2 ) System.out.print(“>=2”);
if( bil_bul4t != 2 ) System.out.print(“!=2”);
if( bil_bul4t == 2 ) System.out.print(“==2”); }

9. Java Program - Operator
public class HelloWorld {
public static void main(String[] args) {
float mc_fl04t;
mc_fl04t = 4/9; }

10. Requirements
JDK
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