ArrayList forEach() method in Java
The forEach() method of ArrayList used to perform the certain operation for each element in ArrayList. This method traverses each element of the Iterable of ArrayList until all elements have been Processed by the method or an exception is raised. The operation is performed in the order of iteration if that order is specified by the method. Exceptions thrown by the Operation are passed to the caller.
Until and unless an overriding class has specified a concurrent modification policy, the operation cannot modify the underlying source of elements so we can say that behavior of this method is unspecified.
public void forEach(Consumer<? super E> action)
Parameter: This method takes a parameter action which represents the action to be performed for each element.
Returns: This method does not returns anything.
Exception: This method throws NullPointerException if the specified action is null.
Below programs illustrate forEach() method of ArrayList:
Program 1: Program to demonstrate forEach() method on ArrayList which contains a list of Numbers.
23 32 45 63
Program 2: Program to demonstrate forEach() method on ArrayList which contains list of Students Names.
list of Students: Student Name is Ram Student Name is Mohan Student Name is Sohan Student Name is Rabi