Java ConcurrentSkipListMap clone()用法及代码示例

java.util.concurrent.ConcurrentSkipListMap的clone()方法是Java中的内置函数，该函数返回此ConcurrentSkipListMap实例的浅拷贝。键和值本身不会被克隆。

用法:

ConcurrentSkipListMap.clone()

参数：该函数不接受任何参数。

参数：此方法不接受任何参数。

返回值：该函数返回此ConcurrentSkipListMap的浅拷贝。

以下示例程序旨在说明上述方法：

示例1:

// Java Program Demonstrate clone() 
// method of ConcurrentSkipListMap 
  
import java.util.concurrent.ConcurrentSkipListMap; 
  
class GFG { 
    public static void main(String[] args) 
    { 
  
        // Initializing the map 
        // using ConcurrentSkipListMap() 
        ConcurrentSkipListMap<Integer, Integer> mpp 
            = new ConcurrentSkipListMap<Integer, 
                                        Integer>(); 
  
        // Adding elements to this map 
        mpp.put(1, 1); 
        mpp.put(5, 2); 
        mpp.put(2, 7); 
  
        // Printing the ConcurrentSkipListMap 
        System.out.println("Map: " + mpp); 
  
        // Cloning the ConcurrentSkipListMap 
        ConcurrentSkipListMap<Integer, Integer> 
            clone_mpp = mpp.clone(); 
  
        // Adding elements to the clone map 
        clone_mpp.put(7, 9); 
  
        System.out.println("Cloned map is:  "
                           + clone_mpp); 
    } 
}

输出：

Map: {1=1, 2=7, 5=2}
Cloned map is:  {1=1, 2=7, 5=2, 7=9}

示例2:

// Java Program Demonstrate clone() 
// method of ConcurrentSkipListMap 
  
import java.util.concurrent.ConcurrentSkipListMap; 
  
class GFG { 
    public static void main(String[] args) 
    { 
  
        // Initializing the map 
        // using ConcurrentSkipListMap() 
        ConcurrentSkipListMap<Integer, Integer> 
            mpp = new ConcurrentSkipListMap<Integer, 
                                            Integer>(); 
  
        // Adding elements to this map 
        mpp.put(10, 5); 
        mpp.put(54, 20); 
        mpp.put(2, 7); 
  
        // Printing the ConcurrentSkipListMap 
        System.out.println("Map: " + mpp); 
  
        // Cloning the ConcurrentSkipListMap 
        ConcurrentSkipListMap<Integer, Integer> 
            clone_mpp = mpp.clone(); 
  
        // Adding elements to the clone map 
        clone_mpp.put(17, 9); 
  
        System.out.println("Cloned map is:  "
                           + clone_mpp); 
    } 
}

输出：

Map: {2=7, 10=5, 54=20}
Cloned map is:  {2=7, 10=5, 17=9, 54=20}

参考： https://docs.oracle.com/javase/9/docs/api/java/util/concurrent/ConcurrentSkipListMap.html#clone–

相关用法

注：本文由纯净天空筛选整理自Twinkl Bajaj大神的英文原创作品 ConcurrentSkipListMap clone() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。