Java Technology
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The document discusses recommendations for computer science students before graduating, including taking programming courses focused on object-oriented principles and design patterns, finding internships that involve programming work, learning English, studying microeconomics, completing sample applications to demonstrate skills, and being active in online communities. It also emphasizes the importance of documentation, graduating quickly, avoiding dismissing non-IT courses, and focusing on skills rather than specific future jobs.
Java Technology
- 1. Seminar Pengantar PKL D III Ilkom @ifnubima [email protected] ifnubim.org
- 2. What You Need from a Platform? Open Technology: Open Source, Free Software, Open Standard Good Language Structure Ecosystem Platform Range Industry Acceptance Proven, widely used, lots of options Complement and Substitute Solution Continues Development Popularity
- 3. Why Java is a Better Technology? WORA, Write Once Run Anywhere. One language for all platform: Desktop, Mobile, Web/Enterprise Portable OOP JDK, JVM and Garbage Collector Logistics Library Framework Servers Resource : tutorial, white paper, case study Precision Mathematic calculation Number handling Security Model
- 4. Why Java is a Better Technology? Bleeding Edge Technology Run on Java Hadoop – Map Reduce and Distributed File System Lucene – Full Text search and Information Retrieval Apache Cassandra – NoSQL Database Support from big software vendor Oracle IBM Spring Source / VMWare JBoss / Red Hat
- 5. Why Java Good For Us? High Paid Developer Great Career Path Working Overseas (Singapore, Malaysia, US, Europe) Big Company Using Java Banking, Insurance, Financial institution : BCA, Mandiri, Permata, Asuransi Wahana Tata, ACC, etc. Telco : Telkomsel, XL, Axis, Indosat, etc Manufacture: Astra Startup : rakuten, blibli Zero investment to start learning Java Zero investment to start Java Company Tons of documents, books, tutorials and forums
- 6. How To Start? Read Books Java Desktop - Ifnu Bima JENI - http://space.meruvian.org/jtechnopreneur/jeni Java Tutorial - http://docs.oracle.com/javase/tutorial/ Java EE - http://download.oracle.com/javaee/6/tutorial/doc/javaeetutorial6.pdf Baca, Tahu, Paham, Hafal Use Java in Your Project http://code.google.com/p/project-template/ https://github.com/endymuhardin Lihat, Amati, Tiru, Modifikasi Internship Certification OJCP (SCJP), SCWCD, SCBD, SCEA – $130. Inixindo or MII
- 7. What Java Looks Like?
- 8. Typical Java Web Application Load UI Browser Webserver (apache httpd) Get/Post data using JSON REST Service Cache Server App Server (memcache) (tomcat) Database (MySQL)
- 9. Important Things To Learn Framework Spring – Dependency Injection, MVC Hibernate – Object Relational Mapping JSP – Java Server Pages UI HTML, CSS JavaScript, jQuery, JSON Server Tomcat – Application Server MySQL – Database Server Linux – OS Server Apache httpd - Webserver Build Tools and Test Maven – Build tools Junit – Unit Testing DB Unit – Unit testing for database application
- 10. Java Love Patterns MVC Model View Controller Façade – Also known as Service Pattern DAO – Data Access Object
- 11. MVC http://www.skywayperspectives.org/docum entation/6.3/images/recipes/mvc_whole.jpg
- 12. Model / Entity @Entity @Table(name = "T_USER") public class User implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "USER_ID") private Integer userId; @Column(name = "BIRTHDATE") @Temporal(TemporalType.DATE) private Date birthdate; @Column(name = "PASSWORD") private String password; @Column(name = "USERNAME") private String username; }
- 13. Controller @Controller public class UserController { @Autowired private UserService userService; @RequestMapping(value="/user/list",method= RequestMethod.GET) public ModelAndView userList(){ ModelAndView modelAndView = new ModelAndView(); modelAndView.setViewName("/userList"); modelAndView.addObject("users", userService.getUsers()); return modelAndView; } }
- 14. Façade / Service Pattern public interface UserService { @Service @Transactional(readOnly=true) List<User> getUsers(); public class UserServiceImpl implements UserService{ } @Autowired private UserDao userDao; @Override public List<User> getUsers() { return userDao.getUsers(); } }
- 15. DAO @Repository public class UserDao { @Autowired private SessionFactory sessionFactory; public List<User> getUsers() { return sessionFactory.getCurrentSession().createQuery("from User u") .list(); } }
- 16. View <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>User Data</title> </head> <body> <h1>User List</h1> <table style="border: 1px"> <tr> <td>User Id</td> <td>User Name</td> <td>Birth Date</td> </tr> <c:forEach var="user" items="${users}"> <tr> <td>${user.userId}</td> <td>${user.username}</td> <td>${user.birthdate}</td> </tr> </c:forEach> </table> </body> </html>
- 17. Typical Java Web Application
- 18. 10 Things You Need to Do Before Graduated Belajar menulis - “A software doesn’t exist, if it doesn’t have documentation!” Kuliah yang bener dan Lulus Cepat– Konsep Ilmu Komputer yang kuat akan sangat membantumu di sesi wawancara kerja Ambil kursus pemrograman, terutama OOP – Belajar programming dengan jalur yang tepat dan metode penulisan kode program yang mengikuti design pattern dan code convention yang baik. Cari tempat magang yang bagus – Setiap universitas pasti mengadakan program magang, manfaatkan dengan baik dan carilah tempat magang yang memberi pekerjaan programming, jangan ambil tugas magang yang hanya memberi tugas input data. Belajar bahasa inggris – Surfing di internet tanpa bisa bahasa inggris sama saja seperti nyetir ga bisa baca rambu lalu lintas.
- 19. 10 Things to Do Before You Graduate! Belajar mikro-ekonomi – Belajar ekonomi dan bayangkan dirimu menjadi enterprenur nantinya, jgn mau jadi bawahan terus. Jangan meremehkan mata kuliah non IT hanya karena membosankan – IP jelek hanya akan menimbulkan banyak keraguan dan impresi yang tidak bagus pada waktu mencari kerja nanti. Berhentilah mengkhawatirkan nanti akan kerja di mana – Do it the best you can do, and it will bring you to the best workplace available. Buatlah sebuah aplikasi sederhana sampai selesai – Aplikasi ini nantinya bisa digunakan pada waktu wawancara, untuk membuktikan bahwa kita bisa menerapkan prinsip “get things done!” tidak cuma coding kesana kemari tapi tidak menyelesaikan pekerjaan. Aktif di komunitas – Dengan sering memposting ke forum/milis kita akan tahu apakah pemahaman dan penguasaan terhadap suatu konsep benar atau salah, cukup atau kurang. Ini penting sekali untuk mengetahui sebenarnya kita siap atau tidak terjun di dunia kerja.