java中的push方法

ArrayDeque类push()方法 (ArrayDeque Class push() method)

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

  push()方法在java.lang包中可用。

• push() Method is used to push an element onto the stack denoted by this deque.

  push()方法用于将元素压入此双端队列表示的堆栈上。

• push() 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.

  push()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• push() Method may throw an exception at the time of pushing an element onto the stack.NullPointerException: This exception may throw when the given element is null exists.

  push()方法在将元素压入堆栈时可能会引发异常。 NullPointerException ：当给定元素为null时，可能引发此异常。

Syntax:

句法：

    public void push(T element);

Parameter(s):

参数：

• T element – represents the element to be pushed onto the stack successfully.

  T element –表示要成功推入堆栈的元素。

Return value:

返回值：

The return type of the method is void, it returns nothing.

该方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example 
// of void push(T element) method of ArrayDeque 
import java.util.*;
public class PushOfArrayDeque {
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");
// Display Deque Elements
System.out.println("d_queue before push(): ");
System.out.println("ArrayDeque Elements = " + d_queue);
System.out.println();
// By using push() method to push the
// elements at the front of ArrayDeque
d_queue.push("Python");
System.out.println();
// Display Deque Elements
System.out.println("d_queue after push(): ");
System.out.println("ArrayDeque Elements = " + d_queue);
}
}

Output

输出量

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

翻译自: https://www.includehelp.com/java/arraydeque-push-method-with-example.aspx

java中的push方法