List in Java dynamic remove processing

Traversing the list in Java encounters the need to dynamically delete some elements in ArrayList

The wrong way

 for (int i = 0, Len = list.size (), i < Len; i++) {      if(List.get (i) = = 1) {         list.remove (i);      }  }  

This throws an exception

Exception in thread "main" Java.lang.indexoutofboundsexception:index:3, Size:3 at      Java.util.ArrayList.RangeCheck (Unknown source) at      java.util.ArrayList.get (Unknown source

This exception is due to the deletion of the element after the corresponding angle is not changed, traversing to the last time will not be found to throw this exception

Correct procedure to remove subscript and navigate to traverse location

 for (int i = 0, Len = list.size (), i < Len; i++) {      if(List.get (i) = = 1) {         List.remove ( i);         Len--;       I--;    }  }

Or use Java's iterator interface to implement traversal

iterator<integer> Iterator = list.iterator ();    while (Iterator.hasnext ()) {      int i = iterator.next ();       if (i = = 1) {          iterator.remove ();      }  }

List in Java dynamic remove processing