As we know, Java ListIterator works in both directions that mean it works in the forward direction as well as backward direction. It is a Bi-directional Iterator. To support this functionality, it has two sets of methods. Forward Direction Iteration methods We need to use the following method...
Example 1: Implementation of ListIterator In the example below, we have implemented thenext(),nextIndex()andhasNext()methods of theListIteratorinterface in anarray list. importjava.util.ArrayList;importjava.util.ListIterator;classMain{publicstaticvoidmain(String[] args){// Creating an ArrayListArrayL...
In Java, theArrayList.listIterator()returns aListIteratorthat iterates over the elements of the current list. AListIteratoris a bi-directional iterator that is fail-fast in nature. By default, elements returned by the list iterator are in proper sequence. 1.ArrayList.listIterator()Method Thelis...
Note that the remove() and set(Object) methods are not defined in terms of the cursor position; they are defined to operate on the last element returned by a call to next() or previous(). This interface is a member of the Java Collections Framework.Since...
Thejava.util.Enumerationinterface is the legacy interface available since JDK1.0, used to iterate over the elements of the legacy collection classes. There are two important methods of thisEnumerationinterface. //Tests if this enumeration contains more elements.booleanhasMoreElements();//Returns the ...
首先看看java.util.Iterator接口的定义: public interface Iterator { boolean hasNext(); Object next(); void remove(); } 依赖前两个方法就能完成遍历,典型的代码如下: for(Iterator it = c.iterator(); it.hasNext(); ) { Object o = it.next(); ...
text/java Element(0) Element(1) Element(2) ... Element(n-1) cursor positions: ^ ^ ^ ^ ^ Note that the#removeand#set(Object)methods arenotdefined in terms of the cursor position; they are defined to operate on the last element returned by a call to#nextor#previous(). ...
}//2if(result.equals("")){result.append("No entires found");}returnresult.toString();}// ...
The list-iterator is fail-fast: if the list is structurally modified at any time after the Iterator is created, in any way except through the list-iterator's own remove or add methods, the list-iterator will throw a ConcurrentModificationException. Thus, in the face of concurrent modification...
TheListinterface provides four methods for positional (indexed) access to list elements. Lists (like Java arrays) are zero based. List集合提供一些关于索引的访问元素的方法,和数组一样起始索引:0; 也就是说List集合是存取是有序的。比如存:11,12,13.取元素也是11,12,13. ...