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Convert integer into byte array (Java)
... class was designed for such dirty hands tasks though. In fact the private java.nio.Bits defines these helper methods that are used by ByteBuffer.putInt():
private static byte int3(int x) { return (byte)(x >> 24); }
private static byte int2(int x) { return (byte)(x >> 16); }
private sta...
Java Map equivalent in C#
...trying to hold a list of items in a collection with a key of my choice. In Java, I would simply use Map as follows:
3 Answe...
How to Iterate over a Set/HashSet without an Iterator?
...opulate set
for (String s : set) {
System.out.println(s);
}
Or with Java 8:
set.forEach(System.out::println);
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How to remove all null elements from a ArrayList or String Array?
...
Try:
tourists.removeAll(Collections.singleton(null));
Read the Java API. The code will throw java.lang.UnsupportedOperationException for immutable lists (such as created with Arrays.asList); see this answer for more details.
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Build and Version Numbering for Java Projects (ant, cvs, hudson)
...-practices for systematic build numbering and version number management in Java projects? Specifically:
9 Answers
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How do I serialize an object and save it to a file in Android?
...se. It is extremely easy to implement too. developer.android.com/reference/java/io/Serializable.html
– mtmurdock
Aug 9 '12 at 22:07
6
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What does 'public static void' mean in Java?
What does public static void mean in Java?
9 Answers
9
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keytool error :java.io.IoException:Incorrect AVA format
... escape it with a leading backslash, e.g. Acme\, Inc. See docs.oracle.com/javase/6/docs/technotes/tools/solaris/…. This also works in the signing dialog of the Eclipse IDE.
– Yojimbo
Apr 30 '13 at 21:26
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Java Regex Capturing Groups
...: This order was placed for QT
group 2: 3000
group 3: ! OK?
More info on Java Pattern here.
Finally, the capturing groups are delimited by round brackets, and provide a very useful way to use back-references (amongst other things), once your Pattern is matched to the input.
In Java 6 groups ca...
How can I safely encode a string in Java to use as a filename?
...the user put in (not with a meaningful name anyway).
EDIT:Fixed regex for java
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