Java 中的 Deque 迭代器()方法
原文:https://www . geesforgeks . org/deque-iterator-method-in-Java/
德格接口 的迭代器()方法以适当的顺序返回这个德格中元素的迭代器。元素将按从第一个(头)到最后一个(尾)的顺序返回。返回的迭代器是“弱一致”迭代器。
语法:
Iterator iterator()
参数:该方法不接受任何参数。
返回:这个方法返回一个迭代器,以适当的顺序遍历这个对象中的元素。
下面的程序说明了迭代器()的方法:
节目 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
程序二:借助 链接列表 。
// 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: 在的帮助下链接锁定程序。
// 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: 在的配合下。
// 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 #迭代器–
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