java iterator

ArrayDeque類iterator()方法 (ArrayDeque Class iterator() method)

• iterator() Method is available in java.lang package.

  iterator()方法在java.lang包中可用。

• iterator() Method is used to return an iterator over the deque elements.

  iterator()方法用于在雙端隊列元素上返回迭代器。

• iterator() Method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  iterator()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• iterator() Method does not throw an exception at the time of returning the Iterator.

  返回迭代器時，iterator()方法不會引發異常。

Syntax:

句法：

    public Iterator<T> iterator();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of the method is Iterator<T>, it returns an iterator over the deque elements.

該方法的返回類型為Iterator <T> ，它在雙端隊列元素上返回一個迭代器。

Example:

例：

// Java program to demonstrate the example 
// of Iterator<T> iterator() method of ArrayDeque 
import java.util.*;
public class IteratorOfArrayDeque {
public static void main(String[] args) {
// Creating an ArrayDeque with initial capacity of
// storing elements
Deque < String > d_queue = new ArrayDeque < String > (10);
// By using add() method to add elements
// in ArrayDeque
d_queue.add("C");
d_queue.add("C++");
d_queue.add("Java");
d_queue.add("Php");
d_queue.add("DotNet");
System.out.println();
// Display Deque Elements
System.out.println("d_queue before iterator() : ");
System.out.println("ArrayDeque Elements = " + d_queue);
System.out.println();
// By using iterator() method to iterate the
// elements in same order as ArrayDeque
System.out.println("d_queue after iterator(): ");
// Display Deque Elements
for (Iterator iter = d_queue.iterator(); iter.hasNext();)
System.out.println("Deque Elements : " + iter.next());
}
}

Output

輸出量

d_queue before iterator() : 
ArrayDeque Elements = [C, C++, Java, Php, DotNet]d_queue after iterator(): 
Deque Elements : C
Deque Elements : C++
Deque Elements : Java
Deque Elements : Php
Deque Elements : DotNet

翻譯自: https://www.includehelp.com/java/arraydeque-iterator-method-with-example.aspx

java iterator