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In Clojure how can I convert a String to a number?
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this gives me Exception in thread "main" java.lang.ClassNotFoundException: Integer.,
– maazza
Mar 31 at 8:15
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What's a good IDE for Python on Mac OS X? [closed]
...toring, and whose primary development language is Python. I come from the Java world, and have been a confident user of Eclipse for a good, long time. When not working in Java, I use emacs.
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What is this: [Ljava.lang.Object;?
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[Ljava.lang.Object; is the name for Object[].class, the java.lang.Class representing the class of array of Object.
The naming scheme is documented in Class.getName():
If this class object represents a reference type that i...
How can I get the SQL of a PreparedStatement?
I have a general Java method with the following method signature:
13 Answers
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Several ports (8005, 8080, 8009) required by Tomcat Server at localhost are already in use
...ipt. If in vain, close Eclipse and then open the task manager and kill all java and/or javaw processes.
Or if you actually installed it as a Windows service for some reason (this is namely intented for production and is unhelpful when you're just developing), open the services manager (Start > ...
'POCO' definition
...said it - Plain Old CLR Object (as opposed to the earlier POJO - Plain Old Java Object)
The POJO one came out of EJB, which required you to inherit from a specific parent class for things like value objects (what you get back from a query in an ORM or similar), so if you ever wanted to move from EJ...
How do I get the file extension of a file in Java?
...ly? It is a great library, full of utilities. Most of them will be part of Java8, like the great Guava Function.
– JeanValjean
Jun 12 '13 at 9:15
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What is the “continue” keyword and how does it work in Java?
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"continue" in Java means go to end of the current loop,
means: if the compiler sees continue in a loop it will go to the next iteration
Example: This is a code to print the odd numbers from 1 to 10
the compiler will ignore the print co...
Java Replacing multiple different substring in a string at once (or in the most efficient way)
... or you are operating on many strings, then it could be worthwhile using a java.util.regex.Matcher (this requires time up-front to compile, so it won't be efficient if your input is very small or your search pattern changes frequently).
Below is a full example, based on a list of tokens taken from ...
Best practices/performance: mixing StringBuilder.append with String.concat
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Effective Java 2-nd edition: Using the string concatenation operator repeatedly to concatenate n strings requires time quadratic in n. So is it still relevant?
– gkiko
Mar 17 '15 at 8:49
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