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Spring DAO vs Spring ORM vs Spring JDBC
... (annotations on DAOs & entities + spring configuration, be it xml- or java-based), decides the implementation technology, be it JPA (SQL) or redis, hadoop, etc. (NOSQL).
If you follow the naming conventions defined by spring for the finder method names, you don't even need to provide the quer...
What's the difference between session.Merge and session.SaveOrUpdate?
...he Merge function is new and was added to to hibernate to conform to a new java standard (I think)
– Torkel
Jan 4 '10 at 9:04
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Difference between CLOCK_REALTIME and CLOCK_MONOTONIC?
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@Stéphane: I surely must be tighter than 10ms. I think Java's System.nanoTime() uses CLOCK_MONOTONIC and can measure durations of 1000ns or less. Maybe you are thinking about system time, which is sometimes limited to milliseconds?
– kevinarpe
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Can you explain the HttpURLConnection connection process?
...penConnection creates a new connection object. From the URL.openConnection javadocs:
A new connection is opened every time by calling the openConnection method of the protocol handler for this URL.
The connection is established when you call openConnection, and the InputStream, OutputStream, o...
Hidden Features of PHP? [closed]
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I also agree. When playing with Java for a Uni assignment, I was stunned at how rigid they were, no flexibility at all. Really made me appreciate just how good PHP arrays are.
– Christian
Jun 22 '09 at 0:54
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What are static factory methods?
...actory method is NOT the same as the Factory Method pattern" (c) Effective Java, Joshua Bloch.
Factory Method: "Define an interface for creating an object, but let the classes which implement the interface decide which class to instantiate. The Factory method lets a class defer instantiation to sub...
How to calculate the angle between a line and the horizontal axis?
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If you found this and you are using JAVASCRiPT it is very important to note that Math.sin and Math.cos take radians so you do not need to convert the result into degrees! So ignore the * 180 / PI bit. It took me 4 hours to find that out. :)
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How do I put all required JAR files in a library folder inside the final JAR file with Maven?
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Usage: mvn install, cd target, java -jar MyJarFile-1.0.jar
– djb
Apr 9 '15 at 22:52
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How to pause / sleep thread or process in Android?
...ng a Timer to using a Handler.
Incidentally, you can't pause a process. A Java (or Android) process has at least 1 thread, and you can only sleep threads.
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Repeat a task with a time delay?
...ere when we importing classes what should we import? android.os.Handler or java.util.logging.Handler ?
– E J Chathuranga
Sep 26 '17 at 9:29
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