number « Generic « Java Collection Q&A

1. Java: Using generics to implement a class that operates on different kinds of numbers    stackoverflow.com

So, let's say I want to write a class that operates on different kinds of numbers, but I don't a priori know what kind of numbers (i.e. ints, doubles, etc.) I ...

2. Is there a way to pass a Number as a parameter in Java?    stackoverflow.com

I'm allocating an array of T, T extends Number inside a class. I can do it this way:

myClass test = new myClass(Double.class, 20);

myClass(Class<T> type, size)
{
    ...

3. Java Generics and numbers    stackoverflow.com

In an attempt to see if I can clean up some of my math code, mostly matrix stuff, I am trying to use some Java Generics. I have the following method:

private ...

4. How to handle numbers in a generic fashion?    stackoverflow.com

My question is eerily similar to "Writing a generic class to handle built-in types" including being inspired by the fact of working on a class to handle operations on matrices. ...

5. Maximum number of type parameters used in a java class    stackoverflow.com

What is the maximum number of type parameters you used in a java class? Example for 4:

class MyClass<A, B, C, D> {
}

6. Comparing the values of two generic Numbers    stackoverflow.com

I want to compare to variables, both of type T extends Number. Now I want to know which of the two variables is greater than the other or equal. Unfortunately I ...

7. What is the difference between and ?    stackoverflow.com

What is the difference between this method declaration:

public static <E extends Number> List<E> process(List<E> nums){

 public static List<Number> process(List<Number> nums){

8. Create a zero value of a generic Number subclass    stackoverflow.com

How can I generically create a zero of an arbitrary numeric type? Here's a toy example: a function that converts a null number into zero.

static <T extends Number> T zeroIfNull(T value) {
 ...

9. Java: Generic methods and numbers    stackoverflow.com

I want to make a generic method which makes the total sum of a List of numbers. What I was trying is this:

public static <T extends Number> T sumList(List<T> data)
{
   ...

10. Arithmetic operations with Java Generics    stackoverflow.com

I am trying to create a generic class in Java that will perform operations on numbers. In the following example, addition, as follows:

public class Example <T extends Number> {

   ...

11. Java generics and the Number class    stackoverflow.com

I want to create a method that compares a number but can have an input that is any of the subclasses of Number. I have looked at doing this in the following ...

12. Java and generics. Isn't 0 a Number?    stackoverflow.com

What is that I'm missing about this snippet of code?

public class Zero<N extends Number> {
  public N zero() {
    return new Integer(0);
  }
}

Type ...

13. how to write a generic method for adding numbers    stackoverflow.com

I want to define a method to make sums between different type numbers:

<T> void add (T one, T two)
{
    T res = one + two; 
}

14. Child classes with an unknown number of dimensions and Generics    forums.oracle.com

I'm trying to write a class for representing datapoints (Unimaginatively called "DataPoint"). This will be used as a super class to different types of data. Different child classes will have a different number of dimensions. The problem is this: Some classes using this datapoint class as a generic type will need to know how many dimensions the datapoint just from its ...