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Give examples of functions which demonstrate covariance and contravariance in the cases of both over
Please show a good example for covariance and contravariance in Java.
3 Answers
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Double decimal formatting in Java
...h is probably different from those of Nambari. Have a look at NumberFormat javadoc : docs.oracle.com/javase/1.4.2/docs/api/java/text/…
– Michael Zilbermann
Oct 9 '12 at 18:54
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java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
...k right the file "add as library" 3. check your import statements in your .java-files.
– Martin Pfeffer
Apr 2 '17 at 12:06
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What is the best Java library to use for HTTP POST, GET etc.? [closed]
What is the best Java library to use for HTTP POST, GET etc. in terms of performance, stability, maturity etc.? Is there one particular library that is used more than others?
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Would you, at present date, use JBoss or Glassfish (or another) as Java EE server for a new project?
If you started a new Java EE project today which is to be finished in about a year, which application server would you choose and why?
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Use JNI instead of JNA to call native code?
...ses this byte buffer. This would require you to copy this buffer from c to java, then copy it back from java to c. In this case jni will win in performance because you can keep and modify this buffer in c, without copying.
These are the problems I've encountered. Maybe there's more. But in general...
Proper usage of Java -D command-line parameters
When passing a -D parameter in Java, what is the proper way of writing the command-line and then accessing it from code?
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Javadoc: package.html or package-info.java
When trying to create package level Javadoc comments, whats the preferred method? What do you do?
1 Answer
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Efficient method to generate UUID String in JAVA (UUID.randomUUID().toString() without the dashes)
...overflow.com/questions/3804591/efficient-method-to-generate-uuid-string-in-java-uuid-randomuuid-tostring-w?rq=1
– Octavia Togami
Nov 22 '14 at 5:52
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Why would one declare a Java interface method as abstract?
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According to the Java Language Specification, the abstract keyword for interfaces is obsolete and should no longer be used. (Section 9.1.1.1)
That said, with Java's propensity for backwards compatibility, I really doubt it will ever make a d...