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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 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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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.
W...
Convert from java.util.date to JodaTime
I want to convert a java.util.Date to JodaTime so as to carry out subtractions between dates. Is there a good concise way to convert from Date to JodaTime ?
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How to scale threads according to CPU cores?
I want to solve a mathematical problem with multiple threads in Java. my math problem can be separated into work units, that I want to have solved in several threads.
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Scripting Language vs Programming Language [closed]
...before you can run it. But in the normal case, you don't have to compile a JavaScript program before you run it. So JavaScript is sometimes called a "scripting" language.
This line is getting more and more blurry since compilation can be so fast with modern hardware and modern compilation technique...
Git: Find the most recent common ancestor of two branches
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Mark Amery
98.8k4848 gold badges336336 silver badges379379 bronze badges
answered Oct 10 '09 at 21:47
CB BaileyC...
How to revert a Git Submodule pointer to the commit stored in the containing repository?
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user229044♦
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answered Oct 24 '11 at 23:13
Adam DymitrukAdam Dymitruk
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How to bring back “Browser mode” in IE11?
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Mark Amery
98.9k4848 gold badges336336 silver badges379379 bronze badges
answered Jul 26 '13 at 9:14
SpudleySpud...