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how to check the jdk version used to compile a .class file [duplicate]
...or this on the command line (for a class called MyClass):
On Unix/Linux:
javap -verbose MyClass | grep "major"
On Windows:
javap -verbose MyClass | findstr "major"
You want the major version from the results. Here are some example values:
Java 1.2 uses major version 46
Java 1.3 uses major v...
Can Java 8 code be compiled to run on Java 7 JVM?
Java 8 introduces important new language features such as lambda expressions.
5 Answers
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How do I get java logging output to appear on a single line?
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As of Java 7, java.util.logging.SimpleFormatter supports getting its format from a system property, so adding something like this to the JVM command line will cause it to print on one line:
-Djava.util.logging.SimpleFormatter.form...
Questions every good Java/Java EE Developer should be able to answer? [closed]
...of this question, and so in the same spirit, I am asking this question for Java/Java EE Developer.
35 Answers
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How to pattern match using regular expression in Scala?
... @rakensi No. val r = "[A-Ca-c]".r ; 'a' match { case r() => } . scala-lang.org/api/current/#scala.util.matching.Regex
– som-snytt
Mar 9 '15 at 23:28
3
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Differences between Java 8 Date Time API (java.time) and Joda-Time
I know there are questions relating to java.util.Date and Joda-Time. But after some digging, I couldn't find a thread about the differences between the java.time API (new in Java 8 , defined by JSR 310 ) and Joda-Time .
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How to create Java gradle project
How to create Java Gradle project from command line?
7 Answers
7
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Closure in Java 7 [closed]
What is closure? It is supposed to be included in Java 7. (Closures were discussed for inclusion in Java 7, but in the end were not included. -ed) Can anyone please provide me with some reliable references from where I can learn stuff about closures?
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Increase heap size in Java
...o worry if you've chosen incorrectly, if you ask for 5g on a 32 bit system java will complain about an invalid value and quit.
As others have posted, use the cmd-line flags - e.g.
java -Xmx6g myprogram
You can get a full list (or a nearly full list, anyway) by typing java -X.
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How to send HTTP request in java? [duplicate]
In Java, How to compose a HTTP request message and send it to a HTTP WebServer?
9 Answers
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