How to use traversal to delete list in Java

This article mainly explains "Java how to use traversal to delete list", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "Java how to use traversal to delete list"!

Java traverses how to delete list conveniently:

1. For loop:

Common writing method in the fifth day of junior high school: (due to the subscript problem can not achieve the desired effect)

For (int ionomy 0 / 10 / 2 / 2) {if (list.get (I) .equals ("del")) list.remove (I);}

2. Enhanced for cycle (foreach loop):

Common error: (ConcurrentModificationException will be thrown)

For (String x:list) {if (x.equals ("del")) list.remove (x);

It should be changed to:

/ / cowlist is original listCopyOnWriteArrayList list = new CopyOnWriteArrayList (cowList); for (String x:list) {if (x.equals ("del")) list.remove (x);}

3. Iterator traversal: (note that if you use the remove method of the iterator, you cannot use the remove method of list)

Iterator it = list.iterator (); while (it.hasNext ()) {String x = it.next (); if (x.equals ("del")) {it.remove ();}}

It is best to use Iterator traversal.

At this point, I believe you have a deeper understanding of "how Java uses traversal to delete list". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!