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What is reflection and why is it useful?
...em (or itself).
For example, say you have an object of an unknown type in Java, and you would like to call a 'doSomething' method on it if one exists. Java's static typing system isn't really designed to support this unless the object conforms to a known interface, but using reflection, your code c...
Converting Long to Date in Java returns 1970
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tl;dr
java.time.Instant // Represent a moment as seen in UTC. Internally, a count of nanoseconds since 1970-01-01T00:00Z.
.ofEpochSecond( 1_220_227_200L ) // Pass a count of whole seconds since the same epoch...
How to free memory in Java?
Is there a way to free memory in Java, similar to C's free() function? Or is setting the object to null and relying on GC the only option?
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Is an array an object in java
In java we can declare an array like
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Maven build failed: “Unable to locate the Javac Compiler in: jre or jdk issue”
I have my JAVA_HOME set to:
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How to do URL decoding in Java?
In Java, I want to convert this:
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Is “Java Concurrency In Practice” still valid? [closed]
Is Java Concurrency in Practice still valid? I am wondering whether the ideas, concepts and implementation described in the book are still compliant with the latest Java versions.
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Unable to find valid certification path to requested target - error even after cert imported
I have a Java client trying to access a server with a self-signed certificate.
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Playing .mp3 and .wav in Java?
How can I play an .mp3 and a .wav file in my Java application? I am using Swing. I tried looking on the internet, for something like this example:
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Maven Install on Mac OS X
...lly comes with Maven 3 built in.
If you're on OS X Lion, you won't have java installed by default. Just run java by itself and it'll prompt you to install it.
Assuming qualifications are met, run mvn -version and see some output like this:
Apache Maven 3.0.3 (r1075438; 2011-02-28 12:31:09-0500...