How do I use the forEach method to iterate over a list in Java?

How do I use the forEach method to iterate over a list in Java?

You can use the forEach method in Java by calling it on a List object. For example:

List<String> myList = Arrays.asList("A", "B", "C");
myList.forEach(item -> System.out.println(item));

This will print each item in the list.

Can I use forEach with a custom object list?

Yes, you can! Just ensure your custom object has a proper toString method. For example:

List<MyObject> myObjects = Arrays.asList(new MyObject(), new MyObject());
myObjects.forEach(obj -> System.out.println(obj));

What if I want to modify the elements while iterating?

The forEach method is not designed for modifying the list while iterating. Instead, consider using a traditional for loop or the Stream API for transformations.

Are there any performance considerations with forEach?

Yes, forEach can be less efficient than traditional loops for large lists, especially if you're performing complex operations. Always consider the context of your use case.