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What is the difference between javac and the Eclipse compiler?
Is Eclipse's Java compiler just a wrapper around the same core that the javac program is wrapped around, or is it a separate compiler altogether? If the latter, why would they reinvent the wheel?
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What is the difference between Set and List?
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WRONG! A Java set can be ordered, depending on the implementation; for example, a Java TreeSet is ordered. In the context of Java, the only difference between a List and a Set is that the Set contains unique items. In the context of m...
How to check if a folder exists
I am playing a bit with the new Java 7 IO features, actually I trying to receive all the xml files of a folder. But this throws an exception when the folder does not exist, how can I check if the folder exists with the new IO?
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Java equivalents of C# String.Format() and String.Join()
... a newbie question, but are there equivalents to C#'s string operations in Java?
16 Answers
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IntelliJ IDEA 13 uses Java 1.5 despite setting to 1.7
...wing error is produced by IntelliJ 13 when trying to compile some simple Java 7 code which does use the diamond operator:
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How to create a memory leak in Java?
I just had an interview, and I was asked to create a memory leak with Java.
Needless to say, I felt pretty dumb having no clue on how to even start creating one.
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Is it possible to make anonymous inner classes in Java static?
In Java, nested classes can be either static or not. If they are static , they do not contain a reference to the pointer of the containing instance (they are also not called inner classes anymore, they are called nested classes).
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Create a List of primitive int?
Is there a way to create a list of primitive int or any primitives in java like following?
10 Answers
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Java - sending HTTP parameters via POST method easily
...out. Change the URL and the POST params as appropriate, of course:
import java.io.*;
import java.net.*;
import java.util.*;
class Test {
public static void main(String[] args) throws Exception {
URL url = new URL("http://example.net/new-message.php");
Map<String,Object> p...
Java SafeVarargs annotation, does a standard or best practice exist?
I've recently come across the java @SafeVarargs annotation. Googling for what makes a variadic function in Java unsafe left me rather confused (heap poisoning? erased types?), so I'd like to know a few things:
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