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initializing a boolean array in java
... would cause ArrayIndexOutOfBoundsException. To learn more about arrays in Java, consult this basic Oracle tutorial.
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When should I use the new keyword in C++?
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Ondrej Slinták
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answered Mar 17 '09 at 17:16
jalfjalf
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Split string to equal length substrings in Java
... split the string "Thequickbrownfoxjumps" to substrings of equal size in Java.
Eg. "Thequickbrownfoxjumps" of 4 equal size should give the output.
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I get exception when using Thread.sleep(x) or wait()
I have tried to delay - or put to sleep - my Java program, but an error occurs.
13 Answers
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How to deal with a slow SecureRandom generator?
If you want a cryptographically strong random numbers in Java, you use SecureRandom . Unfortunately, SecureRandom can be very slow. If it uses /dev/random on Linux, it can block waiting for sufficient entropy to build up. How do you avoid the performance penalty?
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Obtaining a powerset of a set in Java
... This method is now in Guava: guava-libraries.googlecode.com/svn/trunk/javadoc/com/google/…
– Kevin Bourrillion
Jul 9 '10 at 1:59
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Data access object (DAO) in Java
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Check also the sequence diagram here:
http://www.oracle.com/technetwork/java/dataaccessobject-138824.html
Maybe a simple example can help you understand the concept:
Let's say we have an entity to represent an employee:
public class Employee {
private int id;
private String name;
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How to get the filename without the extension in Java?
... surprised how many convenience methods are already included in JDK 7 with java.nio.file.Files and Path -- such as resolving base directories, one-line copying/moving files, getting only the file name etc.
– Don Cheadle
Feb 19 '15 at 20:13
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Volatile vs Static in Java
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Declaring a static variable in Java, means that there will be only one copy, no matter how many objects of the class are created. The variable will be accessible even with no Objects created at all. However, threads may have locally cached values of it.
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Is it better in C++ to pass by value or pass by constant reference?
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Edit: New article by Dave Abrahams on cpp-next: Want speed? Pass by value.
Pass by value for...