双端队列接口的getLast()方法以适当的顺序在此双端队列中的元素上返回迭代器。元素将按照从头(头)到后(尾)的顺序返回。返回的迭代器是一个弱一致性迭代器。
用法:
Iterator iterator()
参数:此方法不接受任何参数。
返回值:此方法以适当的顺序在此双端队列中的元素上返回迭代器。
以下示例程序旨在说明Deque的iterator()方法:
程序1:借助ArrayDeque。
// Java Program Demonstrate iterator()
// method of Deque
import java.util.*;
public class GFG {
public static void main(String[] args)
throws IllegalStateException
{
// create object of Deque
Deque<Integer> DQ
= new ArrayDeque<Integer>();
// Add numbers to end of Deque
DQ.add(7855642);
DQ.add(35658786);
DQ.add(5278367);
DQ.add(74381793);
// Call iterator() method of Deque
Iterator iteratorVals = DQ.iterator();
// Print elements of iterator
// created from Deque
System.out.println("The iterator values"
+ " of Deque are:");
// prints the elements using an iterator
while (iteratorVals.hasNext()) {
System.out.println(iteratorVals.next());
}
}
}
输出:
The iterator values of Deque are: 7855642 35658786 5278367 74381793
程序2:借助LinkedList。
// Java Program Demonstrate iterator()
// method of Deque
import java.util.*;
public class GFG {
public static void main(String[] args)
throws IllegalStateException
{
// create object of Deque
Deque<Integer> DQ
= new LinkedList<Integer>();
// Add numbers to end of Deque
DQ.add(7855642);
DQ.add(35658786);
DQ.add(5278367);
DQ.add(74381793);
// Call iterator() method of Deque
Iterator iteratorVals = DQ.iterator();
// Print elements of iterator
// created from Deque
System.out.println("The iterator values"
+ " of Deque are:");
// prints the elements using an iterator
while (iteratorVals.hasNext()) {
System.out.println(iteratorVals.next());
}
}
}
输出:
The iterator values of Deque are: 7855642 35658786 5278367 74381793
程序3:借助LinkedBlockingDeque。
// Java Program Demonstrate iterator()
// method of Deque
import java.util.*;
import java.util.concurrent.LinkedBlockingDeque;
public class GFG {
public static void main(String[] args)
throws IllegalStateException
{
// create object of Deque
Deque<Integer> DQ
= new LinkedBlockingDeque<Integer>();
// Add numbers to end of Deque
DQ.add(7855642);
DQ.add(35658786);
DQ.add(5278367);
DQ.add(74381793);
// Call iterator() method of Deque
Iterator iteratorVals = DQ.iterator();
// Print elements of iterator
// created from Deque
System.out.println("The iterator values"
+ " of Deque are:");
// prints the elements using an iterator
while (iteratorVals.hasNext()) {
System.out.println(iteratorVals.next());
}
}
}
输出:
The iterator values of Deque are: 7855642 35658786 5278367 74381793
程序4:借助ConcurrentLinkedDeque。
// Java Program Demonstrate iterator()
// method of Deque
import java.util.*;
import java.util.concurrent.ConcurrentLinkedDeque;
public class GFG {
public static void main(String[] args)
throws IllegalStateException
{
// create object of Deque
Deque<Integer> DQ
= new ConcurrentLinkedDeque<Integer>();
// Add numbers to end of Deque
DQ.add(7855642);
DQ.add(35658786);
DQ.add(5278367);
DQ.add(74381793);
// Call iterator() method of Deque
Iterator iteratorVals = DQ.iterator();
// Print elements of iterator
// created from Deque
System.out.println("The iterator values"
+ " of Deque are:");
// prints the elements using an iterator
while (iteratorVals.hasNext()) {
System.out.println(iteratorVals.next());
}
}
}
输出:
The iterator values of Deque are: 7855642 35658786 5278367 74381793
参考: https://docs.oracle.com/javase/8/docs/api/java/util/Deque.html#iterator-
相关用法
- Java Deque contains()用法及代码示例
- Java Deque add()用法及代码示例
- Java ConcurrentLinkedQueue iterator()用法及代码示例
- Java LinkedTransferQueue iterator()用法及代码示例
- Java NavigableSet iterator()用法及代码示例
- Java LinkedBlockingQueue iterator()用法及代码示例
- Java Set iterator()用法及代码示例
- Java TreeSet iterator()用法及代码示例
- Java PriorityBlockingQueue iterator()用法及代码示例
- Java ArrayBlockingQueue iterator()用法及代码示例
- Java LinkedBlockingDeque iterator()用法及代码示例
- Java PriorityQueue iterator()用法及代码示例
- Java ConcurrentSkipListSet iterator()用法及代码示例
- Java ArrayDeque iterator()用法及代码示例
- Java HashSet iterator()用法及代码示例
注:本文由纯净天空筛选整理自gopaldave大神的英文原创作品 Deque iterator() method in Java。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。