Java.util.ArrayDeque.remove(Object)方法範例

java.util.ArrayDeque.remove(Object) 方法從此deque佇列中移除指定元素的單個範例。

宣告

以下是java.util.ArrayDeque.remove(o)方法的宣告

public boolean remove(Object o)

引數

• o -- 要從此deque佇列移除的元素，如果存在的話

返回值

如果此deque 佇列包含指定的元素，此方法返回true。

異常

• NA

例子

下面的範例演示java.util.ArrayDeque.remove(o)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(25);
      deque.add(30);
      deque.add(20);
      deque.add(40);        
           
      // printing all the elements available in deque
      for (Integer number : deque) {
         System.out.println("Number = " + number);
        }

      // deque contains element 30, returns true
      boolean retval = deque.remove(30); 
      if (retval == true) {
         System.out.println("element 30 is removed from the deque");
        }
      else {
         System.out.println("element 30 is not contained in the deque");
        }
		
      // deque does not contain element 15, returns false
      boolean retval = deque.remove(15); 
      if (retval == true) {
         System.out.println("element 15 is removed from the deque");
        }
      else {
         System.out.println("element 15 is not contained in the deque");  
        }
		
      // printing remaining elements
      for (Integer number : deque) {
         System.out.println("Number = " + number);
      }  
   }  
}

讓我們來編譯和執行上面的程式，這將產生以下結果：

Number = 25
Number = 30
Number = 20
Number = 40
element 30 is removed from the deque
element 15 is not contained in the deque
Number = 25
Number = 20
Number = 40