Java LinkedBlockingDeque isEmpty()用法及代碼示例

Java中LinkedBlockingDeque的isEmpty()方法用於檢查此LinkedBlockingDeque是否為空。它返回一個表示是否相同的布爾值。

用法:

public boolean isEmpty()

參數：此方法不接受參數。

返回值：該方法返回一個布爾值，該值表明LinkedBlockingDeque的實例為空。

以下示例說明了LinkedBlockingDeque.isEmpty()方法：

示例1:

// Java Program Demonstrate isEmpty() 
// method of LinkedBlockingDeque 
  
import java.util.concurrent.LinkedBlockingDeque; 
import java.util.*; 
  
public class GFG { 
    public static void main(String[] args) 
        throws IllegalStateException 
    { 
  
        // create object of LinkedBlockingDeque 
        LinkedBlockingDeque<Integer> LBD 
            = new LinkedBlockingDeque<Integer>(); 
  
        // Add numbers to end of LinkedBlockingDeque 
        LBD.add(7855642); 
        LBD.add(35658786); 
        LBD.add(5278367); 
        LBD.add(74381793); 
  
        System.out.println("Linked Blocking Deque: " + LBD); 
  
        // using isEmpty() function 
        System.out.println("Is Linked Blocking Deque empty: "
                           + LBD.isEmpty()); 
    } 
}

輸出：

Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793]
Is Linked Blocking Deque empty: false

示例2:

// Java Program Demonstrate isEmpty() 
// method of LinkedBlockingDeque 
// when the list contains characters 
  
import java.util.concurrent.LinkedBlockingDeque; 
import java.util.*; 
  
public class GFG { 
    public static void main(String[] args) 
        throws IllegalStateException 
    { 
  
        // create object of LinkedBlockingDeque 
        LinkedBlockingDeque<String> LBD 
            = new LinkedBlockingDeque<String>(); 
  
        System.out.println("Linked Blocking Deque: " + LBD); 
  
        // using isEmpty() function 
        System.out.println("Is Linked Blocking Deque empty: "
                           + LBD.isEmpty()); 
    } 
}

輸出：

Linked Blocking Deque: []
Is Linked Blocking Deque empty: true

相關用法

注：本文由純淨天空篩選整理自Code_r大神的英文原創作品 LinkedBlockingDeque isEmpty() method in Java with Example。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。