java offer

ArrayDeque类的offer()方法 (ArrayDeque Class offer() method)

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

  offer()方法在java.lang包中可用。

• offer() Method is used to add the given element at the end of the deque.

  offer()方法用于在双端队列的末尾添加给定元素。

• offer() 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.

  offer()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

• offer() Method may throw an exception at the time of adding element in the deque.

  offer()方法可能会在双端队列中添加元素时引发异常。

  NullPointerException: This exception may throw when the given element is null exists.

  NullPointerException ：当给定元素为null时，可能引发此异常。

Syntax:

句法：

public boolean offer(T element);

Parameter(s):

参数：

• T element – represents the element to be inserted at the last of this deque.

  T element –表示要在此双端队列的最后插入的元素。

Return value:

返回值：

The return type of the method is boolean, it returns true if the given element is added last into the deque successfully, else it returns false.

该方法的返回类型是布尔值 ，如果给定元素最后加入到双端队列成功返回true，否则返回false。

Example:

例：

// Java program to demonstrate the example // of boolean offer(T element) method of ArrayDeque import java.util.*;public class OfferOfArrayDeque {
       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 offer(): ");        System.out.println("ArrayDeque Elements = " + d_queue);        System.out.println();        // By using offer() method to add the        // elements at the last in ArrayDeque        d_queue.offer("Python");        System.out.println("d_queue after offer(): ");        // Display Deque Elements        System.out.println("d_queue.offer() : " + d_queue);    }}

Output

输出量

d_queue before offer(): ArrayDeque Elements = [C, C++, Java, Php, DotNet]d_queue after offer(): d_queue.offer() : [C, C++, Java, Php, DotNet, Python]

翻译自:

java offer