Ooh … Begitu! I see, I see …

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Setelah kelayapan di internet, cari-cari info dari sana-sini dan bongkar pasang tips (terutama programming), akhirnya baru sadar … ternyata begitu caranya … [all about tricks and tips I have found during my work as programmer.]

cast Double to String in java

Double to String casting …
if you want to display its String in number format (like this ###,###,##0.00) do not use these lines …

    
    Double sk = 12300000000.35;
    System.out.println(sk.toString());
    System.out.println(String.valueOf(sk));

they would result like these ones:

1.230000000035E10
1.230000000035E10

use this one instead.

    
    Double sk = 12300000000.35;
    NumberFormat nm = NumberFormat.getNumberInstance();

    System.out.println(nm.format(sk));

the latter result would be this:
12.300.000.000,35

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deprecated File toURL() method in Java 6

after upgrading to Java 6, I just found out that toURL() method is deprecated in Java 6.
after doing some googling, I reached to this page: http://www.jguru.com/faq/view.jsp?EID=1280051

The author (in the link above) said:

The toURL() method of File does not properly escape characters that aren’t valid in a URL. You can write better code today without waiting for Java 6 by calling the toURL() method after calling toURI() on a File object.

and provided these code samples for us:

    URL url1 = file.toURL();         // bad
    URL url2 = file.toURI().toURL(); //good

hmmm … okay, I got it.

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