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Update JRE pada Ubuntu

Telah kita ketahui bahwa Java merupakan bahasa yang multiplatform, yang bisa berjalan di banyak sistem operasi. Sekali membuat program, maka bisa dijalankan di mana saja, asalkan di sistem operasi "induk" terdapat Java Environmentnya.

Untuk instalasi JDK (Java Development Kit) atau JRE (Java Runtime Environment) di linux, mungkin teman-teman agak mengalami kesulitan, karena pada beberapa distro linux, misalkan ubuntu, walaupun kita sudah menginstall JRE, tapi JRE sistem tidak otomatis terupdate. Berikut cara mengupdate JRE di ubuntu:

1. misal kita download JDKnya saja sekalian, biar bisa untuk develop Java. Mis yang kita donlot bernama: jdk6u3.bin di  forlder /home/arwan.
2. Buka terminal dan arahkan ke folder dimana master jdk berada
3. ketikkan: $ chmod +x jdk6u3.bin
4. jalankan file tersebut: $ ./jdk6u3.bin
5. Tekan enter sampai EULAnya (End User License Agreement) habis, lalu ketikkan "yes"
6. Update konfigurasi java, ketikkan:
    $ sudo update-alternatives --install /usr/bin/java java /usr/lib/jdk1.6.0_06/bin/java 300
    $ sudo update-alternatives --config java
7. Untuk mengecek apakah java runtime environment yang baru sudah terupdate, ketikkan:
    $ java --version
8. Beres, dah....

NB: pada langkah ke-6, silahkan menyesuaikan versi jdk dengan melihat di /usr/lib :D
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