Generic methods in Java - RichardDanielOliva/java-learning-wiki GitHub Wiki

Generic methods in Java are methods that allow you to create a new type parameter just for that method. This is useful if you are writing a method but want to be flexible about the type of objects you can pass in.

These are some properties of generic methods:

• Generic methods have a type parameter (the diamond operator enclosing the type) before the return type of the method declaration
• Type parameters can be bounded. See: Bounded Type Parameters
• Generic methods can have different type parameters separated by commas in the method signature
• Method body for a generic method is just like a normal method.

The s**yntax for a generic method **includes a list of type parameters, inside angle brackets, which appears before the method's return type. For static generic methods, the type parameter section must appear before the method's return type.

public <T> List<T> fromArrayToList(T[] a) {   
    return Arrays.stream(a).collect(Collectors.toList());
}

public static <K, V> boolean compare(Pair<K, V> p1, Pair<K, V> p2) {
        return p1.getKey().equals(p2.getKey()) &&
               p1.getValue().equals(p2.getValue());
    }