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2. What does the arrow operator, '->', do in Java? - Stack Overflow

   stackoverflow.com/questions/15146052

   1. The arrow operator is used to create lambda expressions, linking/separating parameters with the lambda body. syntax: (parameters) -> {expression}; It is also an efficient way of implementing functional interfaces like onClickListeners in java. answered Dec 2, 2022 at 10:09. hiro hamanda.

3. How to pass a function as a parameter in Java? [duplicate]

   stackoverflow.com/questions/4685563

   A common pattern would be to 'wrap' it within an interface, like Callable, for example, then you pass in a Callable: public T myMethod(Callable<T> func) {. return func.call(); } This pattern is known as the Command Pattern. Keep in mind you would be best off creating an interface for your particular usage.

4. Nested functions in Java - Stack Overflow

   stackoverflow.com/questions/7367714

   Java 8 introduces lambdas. i *= num; System.out.println(i); times.accept(i, 2); //multiply i by 2 and print i. times.accept(i, i); //square i and then print the result. The () -> syntax works on any interface that defines exactly one method. So you can use it with Runnable but it doesn't work with List.

5. Help with understanding a function object or functor in Java

   stackoverflow.com/questions/7369460

   A function object is just that. Something which is both an object and a function. Aside: calling a function object a "functor" is a serious abuse of the term: a different kind of "functors" are a central concept in mathematics, and one that has a direct role in computer science (see "Haskell Functors"). The term is also used in a slightly ...

6. Java's methods vs. functions - Stack Overflow

   stackoverflow.com/questions/16223531

   Java is truly object oriented I wouldn't say so. Java has static methods (in fact the entry point to each Java program is a static method), and they belong to classes, but not to objects. Java is an imperative, procedural language that can (and should) be used in an Object Oriented way, but it's by no means a pure OO language.

7. How do I use optional parameters in Java? - Stack Overflow

   stackoverflow.com/questions/965690

   Output is. someString = something, someInt = 5. To skip all the optional values you'd have to call it like foo(o -> {}); or if you prefer, you can create a second foo() method that doesn't take the optional parameters. Using this approach, you can specify optional values in any order without any ambiguity.

8. How can I write an anonymous function in Java? - Stack Overflow

   stackoverflow.com/questions/2755445

   Lets take example from java docs to get know how we can declare anonymous functions, classes The following example, HelloWorldAnonymousClasses, uses anonymous classes in the initialization statements of the local variables frenchGreeting and spanishGreeting, but uses a local class for the initialization of the variable englishGreeting:

9. Java: get greatest common divisor - Stack Overflow

   stackoverflow.com/questions/4009198

   If you are using Java 1.5 or later then this is an iterative binary GCD algorithm which uses Integer.numberOfTrailingZeros() to reduce the number of checks and iterations required.

10. Reverse a string in Java - Stack Overflow

    stackoverflow.com/questions/7569335

    2. One natural way to reverse a String is to use a StringTokenizer and a stack. Stack is a class that implements an easy-to-use last-in, first-out (LIFO) stack of objects. String s = "Hello My name is Sufiyan"; Put it in the stack frontwards. Stack<String> myStack = new Stack<>();

11. Can I add a function to enums in Java? - Stack Overflow

    stackoverflow.com/questions/2457076

    I have an enum, which looks like public enum Animal { ELEPHANT, GIRAFFE, TURTLE, SNAKE, FROG } and I want to do something like Animal frog = Animal.FROG; Animal snake = Animal.SNAKE;