Has next method in collection?

Method next() and hasNext() Method hasNext() returns true / false – if collection has more values/elements, it returns true otherwise it returns false. Method next() returns the next element in the collection.

How do you return a collection in java?

The list() method of java. util. Collections class is used to return an array list containing the elements returned by the specified enumeration in the order they are returned by the enumeration. This method provides interoperability between legacy APIs that return enumerations and new APIs that require collections.

What is the difference next () and hasNext () method?

hasNext() – Returns true if the iteration has more elements. next() – Returns the next element in the iteration.

What is the return type of any () method?

You declare a method’s return type in its method declaration. Within the body of the method, you use the return statement to return the value. Any method declared void doesn’t return a value and cannot contain a return statement. Any method that is not declared void must contain a return statement.

What does next () do in Java?

The next() is a method of Java Scanner class which finds and returns the next complete token from the scanner which is in using.

What does iterator next return?

E next() – Returns the next element in the iteration. void remove() – Removes from the underlying collection the last element returned by the iterator (optional operation).

What is return type in Java?

A return statement causes the program control to transfer back to the caller of a method. Every method in Java is declared with a return type and it is mandatory for all java methods. A return type may be a primitive type like int, float, double, a reference type or void type(returns nothing).

How do I return two lists in Java?

You can just return them in an array. There is no easy way to do this in Java. You can create a small wrapper class to contain both elements, you can return a list of both lists, a set of both lists, or a Map> containing 2 entries with both lists. Add your lists ( eventList and emailList ) to this super list.

What is the return type of hasNext () method of an iterator?

1. Which of these return type of hasNext() method of an iterator? Explanation: hasNext() returns boolean values true or false.

What is the return type of object in Java?

Returning an array from a method with the Object class as its return type. In Java, an object of any type(array object or a class object) has a parent class, Object i.e. mother of all classes in Java. Hence, an array or an object of any class can be returned from a method with the Object return type.

What is the return type of next method in scanner class?

Method	Returns
String next()	Finds and returns the next complete token from this scanner and returns it as a string; a token is usually ended by whitespace such as a blank or line break. If not token exists, NoSuchElementException is thrown.