singleton « concurrency « Java Thread Q&A

1. Single instantiation with arguments    stackoverflow.com

I have a class (RInterfaceHL) that calls another class (JRIEngine) which provides native methods on a single-threaded application. Therefore I only want to have a single instance of my class (RInterfaceHL) ...

2. Which implementation for lazy singleton whose initialialization might fail?    stackoverflow.com

Imagine you have a static no-argument method which is idempotent and always returns the same value, and may throw a checked exception, like so:

class Foo {
 public static Pi bar() throws ...

3. is this Singleton resistant to both Serialization and Reflection Attacks?    stackoverflow.com

Is the following code resistant to both Serialization and Reflection Attacks?

public class Example{
  private static Example instance=new Example();

  private Example(){}

  public static Example getInstance(){
    return ...

4. Concurrent access of Singleton in java    stackoverflow.com

I have a sinlgeton object which holds one method, witch is NOT synchronized. The singleton can be accessed by many clients at a time - what will happen if multiple clients ...