java isempty
ArrayDeque类isEmpty()方法 (ArrayDeque Class isEmpty() method)isEmpty() Method is available in java.lang package.
isEmpty()方法在java.lang包中可用。
isEmpty() Method is used to check whether this deque is "empty" or "non-empty".
isEmpty()方法用于检查此双端队列是“空”还是“非空”。
isEmpty() 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.
isEmpty()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。
isEmpty() Method does not throw an exception at the time of checking the empty status of this deque.
在检查此双端队列的空状态时， isEmpty()方法不会引发异常。
Syntax:
句法：
public boolean isEmpty();Parameter(s):
参数：
It does not accept any parameter.
它不接受任何参数。
Return value:
返回值：
The return type of the method is boolean, it returns true if this queue is empty else it returns false.
方法的返回类型为boolean ，如果此队列为空，则返回true ，否则返回false 。
Example:
例：
// Java program to demonstrate the example // of boolean isEmpty() method of ArrayDeque import java.util.*;public class IsEmptyOfArrayDeque { 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 : "); System.out.println("ArrayDeque Elements = " + d_queue); System.out.println(); // By using isEmpty() method is to check the // empty status of ArrayDeque boolean b = d_queue.isEmpty(); System.out.println("d_queue.isEmpty() : " + b); }}Output
输出量
d_queue : ArrayDeque Elements = [C, C++, Java, Php, DotNet]d_queue.isEmpty() : false翻译自: https://www.includehelp.com/java/arraydeque-isempty-method-with-example.aspx
java isempty