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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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Collections.emptyMap() vs new HashMap()
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From Effective Java, Item #43 - "Return empty arrays or collections, not null" demonstrates returning an empty collection and perhaps even demonstrates using these emptyList(), emptySet(), and emptyMap() methods on the Collections class to...
java.sql.SQLException: - ORA-01000: maximum open cursors exceeded
...n extremely common error in Oracle database development. In the context of Java, it happens when the application attempts to open more ResultSets than there are configured cursors on a database instance.
Common causes are:
Configuration mistake
You have more threads in your application querying...
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 > ...
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...
'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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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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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...