java中clear方法_Java ArrayDeque clear（）方法与示例

爱被打了一巴掌 2023-03-05 15:51 10阅读 0赞

java中clear方法

## ArrayDeque类clear()方法 **(**ArrayDeque Class clear() method**)** ##

*  **clear() Method** is available in java.lang package.
    
    **clear()方法**在java.lang包中可用。
 *  **clear() Method** is used to delete or clear all of the elements from this deque.
    
    **clear()方法**用于删除或清除此双端队列中的所有元素。
 *  **clear() 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.
    
    **clear()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。
 *  **clear() Method** does not throw an exception at the time of clearing all of the elements from deque.
    
    从双端队列清除所有元素时， **clear()方法**不会引发异常。

**Syntax:**

**句法：**

public void clear();

**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 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 clear() method of ArrayDeque 
    
    import java.util.*;
    
    public class ClearOfArrayDeque {
        
        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 clear(): ");
            System.out.println("ArrayDeque = " + d_queue);
    
            // By using clear() method to clear the elements
            // from ArrayDeque
            d_queue.clear();
    
            System.out.println();
    
            // Display Deque Elements
            System.out.println("d_queue after clear(): ");
            System.out.println("ArrayDeque = " + d_queue);
        }
    }

**Output**

**输出量**

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

> 翻译自: [https://www.includehelp.com/java/arraydeque-clear-method-with-example.aspx][https_www.includehelp.com_java_arraydeque-clear-method-with-example.aspx]

java中clear方法

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