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PEMROGRAMAN BERORIENTASI OBJECTPEMROGRAMAN BERORIENTASI OBJECTINTRODUCTION TO JAVA PROGRAMMING

I Made Suartana, S.Kom, M.Kom

A QUICK TOUR OF JAVA

Materi: Java Platform Java Platform. Elements dasar bahasa pemrograman Java:

Variabel Nama konstata Flow Control

Class dan Object Class dan Object. Bagaimana mengcompile dan melakukan

exekusi program java(menggunakan JCreator).

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INTRO JAVA

Arsitektur Java Dibagi atas Tiga Bagian, Yaitu:E i J (J2EE)Enterprise Java (J2EE)

Standar Java (J2SE)Micro Java (J2ME)

JAVA PLATFORM

Java Platform terdiri dari 3 komponen: 1. Bahasa Pemrograman Java. 2. Packages Java . 3. Java Virtual Machine (JVM) / JRE.

Bahasa Pemrograman Java – Disingkat Java. Sintaksis.

Packages Java. Kumpulan class pada java.

Java Virtual Machine. Virtual mesin sebagai environmen untuk menjalankan

program java (JRE).

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PACKAGES IN JAVA

PACKAGES JAVA

java.applet java.io Applet class

java.awt Windows, buttons, mouse,

etc.

java.awt.image image processing

System.out.print

java.lang length method for arrays;

exceptions

java.net sockets

java.awt.peer GUI toolkit

java.util System.getProperty

See http://java.sun.com/reference/api/for the current APIs

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EXAMPLE JAVA PACKAGE -1-

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EXAMPLE JAVA PACKAGE -2-

8

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EXAMPLE JAVA PACKAGE -3-

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GETTING STARTED

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LET’S START WITH “HELLO WORLD”

public class Hello{

/*** Program Java My first */public static void main( String[] args ){

//menampilkan String Hello world pada layarSystem.out.println(“Hello world”);

}}

Java programs are built from classes.

JAVA COMMENTS

Comments in Code – enable to write descriptive text.

/* Comment type 1 – This text is ignored by the compiler */ / Comment type 1 This text is ignored by the compiler / // Comment type 2 – The text up to the end of line is ignored

/** Documentation comment is extracted by javadoc tool */

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JAVA IDENTIFIER

Identifier (variabel, method, class, )C i i Case sensitive

Start withAlphabet “_” “$”

keyword Java

JAVA KEYWORDSabstract boolean breakbyte case catchchar class constcontinue default docontinue default dodouble else extendsfinal finally floatfor goto ifimplements import instanceofint interface longnative new packageprivate protected publicreturn short staticsuper switch synchronizedthis throw throwstransient try voidvolatile while

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VARIABLES

Java has build-in primitives to support boolean, character, integer and floating-point values.----------------------------------------------------------------------------------------- boolean either true or false boolean b = true;------------------------------------------------------------------------------------------ char 16-bit Unicode 1.1 character char ch = ‘J’;------------------------------------------------------------------------------------------ byte 8-bit integer (signed) byte bt = 127; short 16-bit integer (signed) short sh = 32767; int 32-bit integer (signed) int i = 2147483647; long 64-bit integer (signed) long l = 9223372036854775807L;------------------------------------------------------------------------------------------- float 32-bit floating-point (IEEE 754-1985) float f = 1.0f; double 64-bit floating-point (IEEE 754-1985) double d = 1.e-1;-------------------------------------------------------------------------------------------

NUMERIC OPERATORS IN JAVAPrec Operator Description Example1 ++ Increment by 1(or 1.0) k++1 -- Decrement by 1(or 1.0) k--ec e e by (o . )1 + Unary plus +value1 - Unary minus -value2 * Multiplication x * y2 / Division x / y2 % Modulo x % y3 + Addition x + y3 - Subtraction x - y5 < Less than x < y5 > Greater than x > y5 <= Less than/equal x <= y5 >= Greater than/equal x >= y6 == Equals (identical values) x == y6 != Is not equal to x != y13 op= op assignment(+ =, - =, *=, etc) x += y

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BITWISE AND LOGIC OPERATORSPrec Operator Type Description Example1 ~ Integral Unary bitwise complement ~x1 ! Logical Unary logical complement !b1 ! Logical Unary logical complement !b4 << Integral Left shift x << 24 >> Integral Right shift (keep sign) x >> 54 >>> Integral Right shift (zero fill) x >>> 35 instanceof Obj type Tests class membership o instanceof X6 == Object Equals (same object) x == y6 != Object Unequal (different object) x != y7 & Integral Bitwise AND x & y7 & Logical Logical AND b1 & b28 ^ Integral Bitwise XOR x ^ y8 ^ Logical Logical XOR b1 ^ b29 | Integral Bitwise OR x | y9 | Logical Logical OR b1 | b2

BITWISE AND LOGIC OPERATORS (CONTINUED)

Prec Operator Type Description Examp.10 && Logical Logical AND (conditional) b && c11 || Logical Logical OR (conditional) b1 || b211 || Logical Logical OR (conditional) b1 || b212 ?: Logical Conditional (ternary) b ? x : y13 = Variable,any Assignment x = 113 <<= Binary Left shift with assignment x <<= 213 >>= Binary Right shift with assignment x =>> 313 >>>= Binary Right shift, zero fill, assign x =>> 413 &= Binary Bitwise AND with assign x &= y13 &= Logical Logical AND with assign b1 &=b213 |= Binary Bitwise OR with assignment x |= y13 |= Logical Logical OR with assignment b1 |=b213 ^= Binary Bitwise XOR with assignment x ^= y13 ^= Logical Logical XOR with assignment b1 ^=b2

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FLOW OF CONTROL

Flow of control is the term used for describing which statements are executed in a programwhich statements are executed in a program.

Flow statements are: if – else for switch do – while While

IF, IF-ELSE, IF ELSE –IF ELSE1. if (boolean-expression) {

statements; }}

2. if (boolean-expression) { statements;

} else {statements;

}

3. if (boolean-expression) { statements;

} else if (boolean-expresion ) {statements;

} else {statements;

}

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FOR STATEMENT

A for statement should have the following form:for (initialization; condition; update) {for (initialization; condition; update) {

statements;}

Ex:for (k = 0 flag; k < 10 && flag; k++ ) {for (k 0, flag; k < 10 && flag; k++ ) {

. . .}

WHILE, DO - WHILE STATEMENTS

while, do-while and for control looping are classified as iteration statements.

while (condition) {statements;

}

do {statements;

} while (condition);

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SWITCH

The switch is classified as a selection statement.

switch (integral-selector) { case integral-value1:

statements; break; default:

statements; } .

EXECUTION

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TOOLS

Java Standard Edition Editor

Text Editor Integrated Development Environment (IDE)

This course use

CREATE CLASS

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EXAMPLE

Class Kalkulator