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How to check if a String is numeric in Java
...tils.isParsable which basically checks the number is parsable according to Java. (The linked javadocs contain detailed examples for each method.)
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Difference between Java Enumeration and Iterator
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Looking at the Java API Specification for the Iterator interface, there is an explanation of the differences between Enumeration:
Iterators differ from
enumerations in two ways:
Iterators allow the caller to remove elements from the under...
Unloading classes in java?
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Note also that according to java.sun.com/docs/books/jls/second_edition/html/… unloading of classes is an optimization and, depending on the JVM implementation, may or may not actually occur.
– user21037
Feb 18 '1...
How does Java Garbage Collection work with Circular References?
From my understanding, garbage collection in Java cleans up some objects if nothing else is 'pointing' to that object.
8 An...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
...a JSP file in my WebContent/jsps folder. I have a servlet class servlet.java in my default package in src folder. In my web.xml it is mapped as /servlet .
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How do you create a dictionary in Java? [closed]
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@Cruncher It also implements Map (check the javadoc)
– arshajii
Nov 24 '12 at 17:17
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PHP equivalent of .NET/Java's toString()
...didn't mention that at all. The user asked for an answer that was like the Java toString() method, and in PHP, that's the __toString() function.
– Supuhstar
Apr 9 '13 at 1:41
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IntelliJ IDEA JDK configuration on Mac OS
...ble under IntelliJ IDEA File menu.
Direct JDK path after the recent Apple Java update is:
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
In IDEA you can configure the new JSDK in File | Project Structure, select SDKs on the left, then press [+] button, then specify the above JD...
Get Mouse Position
I would like to simulate a natural mouse movement in Java (going from here to there pixel by pixel). To do that I need to know the starting coordinates.
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Java Singleton and Synchronization
... return InstanceHolder.instance;
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This solution takes advantage of the Java memory model's guarantees about class initialization to ensure thread safety. Each class can only be loaded once, and it will only be loaded when it is needed. That means that the first time getInstance is called, Instan...