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Pengenalan OOP Java

Praktikum OOP Java (IX307). Pengenalan OOP Java. Struktur Program Java (1). Source program Java SELALU terdiri dari kelas-kelas (paling sedikit satu kelas di setiap file program) Jika sebuah source / file program memiliki beberapa kelas, maka hanya ada 1 kelas yg bersifat public

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Pengenalan OOP Java

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  1. Praktikum OOP Java (IX307) Pengenalan OOP Java

  2. Struktur Program Java (1) Source program Java SELALU terdiri dari kelas-kelas (paling sedikit satu kelas di setiap file program) Jika sebuah source / file program memiliki beberapa kelas, maka hanya ada 1 kelas yg bersifat public Nama kelas public = Nama file File program Java mempunyai extension .java

  3. Struktur Program Java (2) Didalam sebuah kelas terdapat : Atribut (data) Method (fungsi/prosedur) contoh: public class Mahasiswa { String NRP; //atribut String Nama; int no_komputer; public String getNama() { //method return Nama; } }

  4. Struktur Program Java (3) Program java memiliki sebuah fungsi khusus yg bernama main(). Program akan dieksekusi mulai dari fungsi main contoh: public class Mahasiswa { String NRP; //atribut String Nama = “Tommy”; int no_komputer; public String getNama() { //method return Nama; } public static void main(String[] args) { Mahasiswa mhs = new Mahasiswa(); System.out.println("Hello " + mhs.getNama() + " selamat belajar java!"); } }

  5. Pemrosesan Program Java Program java dicompile dengan cara : D:\>javac Namaprg.java Program java dijalankan dengan cara : D:\>java Namaprg

  6. Tipe Data (1) Integer byte : 1 byte (8 bits) di memori short : 2 bytes (16 bits) di memori int : 4 bytes (32 bits) di memori long : 8 bytes (64 bits) di memori

  7. Tipe Data (2) Floating point float : range nilai dari -3.4E38 (-3.4 x 1038) ke +3.4E38 (+3.4 x 1038), 4 bytes di memori double : range nilai dari -1.7E308 (-1.7 x 10308) ke +1.7E308 (+1.7 x 10308), 8 bytes di memori

  8. Setting Java • Install jdk (jdk-6u6-windows-i586-p) • Masukkankedalam path & Classpath: • KlikkananmyComputer -> Properties -> Tab Advanced -> Environment Variables • Cari environment variabel PATH -> klik Edit, kemudiantambahkan : ; C:\Program Files\Java\jdk1.6.0_03\bin (sesuaikandenganhasil install dikomputeranda, tanda ; sebagaipemisahdengan PATH lain) • Cari environment variabel CLASSPATH -> klik Edit, kemudiantambahkan : ; . (titikkoma, dantitik=current directory) • Jikabelumadaklik New, isi Name : CLASSPATH, dan value : ; .

  9. EditPlus2 • Install Editplus2 • Copykan file tool.ini ke folder hasil install editplus, biasanyadi : C:\Program Files\EditPlus 2 • Cara mengkompilasi program : Tools -> Java-Compile atau Ctrl+1 • Cara menjalankan program : Tools -> Java-Run atau Ctrl+2

  10. Netbeans • Install jdk (install sajatidakperlu setting PATH dan CLASSPATH) • Install Netbeans • Membuat Project baru : • Pilih menu File -> New Project -> Projects: Java Application -> klik Next • Isinama project & tentukanletak project • Buangcentang Create Main Class -> klik Finish • Klikkanan Source Packages -> New -> Java Class • Masukkannamakelas -> klik Finish

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