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Explain the use of a bit vector for determining if all characters are unique
...ks to this data structure for different languages/platforms:
CPP: BitSet
Java: BitSet
C#: BitVector32 and BitArray
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Maven project.build.directory
...utDirectory>
<sourceDirectory>${project.basedir}/src/main/java</sourceDirectory>
<scriptSourceDirectory>src/main/scripts</scriptSourceDirectory>
<testSourceDirectory>${project.basedir}/src/test/java</testSourceDirectory>
<reso...
Java logical operator short-circuiting
...d so you can skip evaluating the rest of the expressions.
You indicate to Java that you want short-circuiting by using && instead of & and || instead of |. The first set in your post is short-circuiting.
Note that this is more than an attempt at saving a few CPU cycles: in expressions ...
How to format a number 0..9 to display with 2 digits (it's NOT a date)
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You can use:
String.format("%02d", myNumber)
See also the javadocs
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Byte order mark screws up file reading in Java
I'm trying to read CSV files using Java. Some of the files may have a byte order mark in the beginning, but not all. When present, the byte order gets read along with the rest of the first line, thus causing problems with string compares.
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Limit a stream by a predicate
Is there a Java 8 stream operation that limits a (potentially infinite) Stream until the first element fails to match a predicate?
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Combining multiple @SuppressWarnings annotations - Eclipse Indigo
...for a list parameter. When using an SDK to run Eclipse (or when having the Java sources attached), you can simply hit F3 on any annotation to see its source declaration, thereby also seeing how many (and which) parameters it needs.
– Bananeweizen
Oct 25 '12 at ...
How do I call one constructor from another in Java?
...structor parameters are used, consider a builder. See Item 2 of "Effective Java" by Joshua Bloch.
– koppor
Nov 13 '12 at 20:16
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Generating all permutations of a given string
...a and ab , but what about longer string such as abcdefgh ? Is there any Java implementation example?
52 Answers
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Regex doesn't work in String.matches()
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Welcome to Java's misnamed .matches() method... It tries and matches ALL the input. Unfortunately, other languages have followed suit :(
If you want to see if the regex matches an input text, use a Pattern, a Matcher and the .find() me...