CODEWITHSUNDEEP
javaarraylist
user7507212
user7507212

Reputation:

How to modify an element in Array list

I have created the below arrayLIST . I want to modify the phone number of [email protected]. Can you please let me know how to modify it. Thanks in advance

 private static List<Customer> customers;
{
    customers = new ArrayList();
    customers.add(new Customer(101, "John", "Doe", "[email protected]", "121-232-3435"));
    customers.add(new Customer(201, "Russ", "Smith", "[email protected]", "343-545-2345"));
    customers.add(new Customer(301, "Kate", "Williams", "[email protected]", "876-237-2987"));

}

Upvotes: 1

Views: 1403

Answers (3)

user_3380739
user_3380739

Reputation: 1284

Similar with the solution provided by @Sean Patrick Floyd, if you want want to modify all the customers with email "[email protected]": 

customers.stream().filter(e -> "[email protected]".equals(e.getEmail()))
                  .forEach(e -> e.setPhoneNumber("xxx-xxx-xxxx"));

Upvotes: 0

pratikpncl
pratikpncl

Reputation: 528

Assuming you have getters and setters, loop through the list and update the phone number when the e-mail matches the one you want

for (Customer customer : customers){
    if (customer.getEmail().equals("[email protected]")){
        customer.setPhoneNumber("xxx-xxx-xxxx");
    }
}

Upvotes: 2

Sean Patrick Floyd
Sean Patrick Floyd

Reputation: 299218

With Java 8 streams, use a predicate to find the customer, and Optional.ifPresent() to update the value.

customers.stream()
         .filter(customer -> "[email protected]".equals(customer.getEmail()))
         .findFirst()
         .ifPresent(customer -> customer.setPhoneNumber(2222222));

Upvotes: 3

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