java.util.ArrayDeque.size() 方法返回在此deque佇列的元素個數。
以下是java.util.ArrayDeque.size()方法的宣告
public int size()
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此方法返回在此deque佇列的元素個數。
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下面的範例演示java.util.ArrayDeque.size()方法的用法。
package com.yiibai; import java.util.ArrayDeque; import java.util.Deque; public class ArrayDequeDemo { public static void main(String[] args) { // create an empty array deque with an initial capacity Deque<Integer> deque = new ArrayDeque<Integer>(8); // use add() method to add elements in the deque deque.add(15); deque.add(20); deque.add(25); deque.add(22); // let us print all the elements available in deque for (Integer number : deque) { System.out.println("Number = " + number); } // this will print the size of this deque int retval = deque.size(); System.out.println("Size of deque = " + retval); } }
讓我們來編譯和執行上面的程式,這將產生以下結果:
Number = 15 Number = 20 Number = 25 Number = 22 Size of deque = 4