[Solved] How to iterate over Array List and modify elements inside the object in Java?

by


Assuming that class CatchesItem has time field defined as LocalDateTime, the check for today’s timestamp may be implemented as follows:

import java.time.*;

// ...
LocalDate today = LocalDate.now();
for (CatchesItem item : items) {
    if (today.equals(item.getTime().toLocalDate())) {
        item.setAmount(item.getAmount() + 5); // add some value to amount
    }
}
items.forEach(System.out::println);

Output (for the input data as of Feb 18)

CatchesItem(amount=1, condition=0.0, time=2021-02-17T17:10:42)
CatchesItem(amount=4, condition=1.0, time=2021-02-17T17:10:48)
CatchesItem(amount=10, condition=2.0, time=2021-02-18T17:10:54)

1

solved How to iterate over Array List and modify elements inside the object in Java?