Java ConcurrentSkipListSet clone()方法
java.util.concurrent.ConcurrentSkipListSet的 clone() 方法是Java中的一个内置函数,它返回该ConcurrentSkipListSet实例的一个浅层拷贝。
语法
ConcurrentSkipListSet.clone()
参数: 该函数不接受任何参数。
返回值: 该函数返回ConcurrentSkipListSet的一个浅层拷贝。
下面的程序说明了ConcurrentSkipListSet.clone()方法。
程序1 :
// Java Program Demonstrate clone()
// method of ConcurrentSkipListSet
import java.util.concurrent.*;
class ConcurrentSkipListSetCloneExample1 {
public static void main(String[] args)
{
// Initializing the set
ConcurrentSkipListSet<Integer>
set = new ConcurrentSkipListSet<Integer>();
// Adding elements to this set
for (int i = 10; i <= 15; i++)
set.add(i);
// Printing elements of the set
System.out.println("The set contains: " + set);
// Cloning the ConcurrentSkipListSet
ConcurrentSkipListSet<Integer> clone_set = set.clone();
// Adding elements to the clone set
clone_set.add(16);
// Printing elements of the clone set
System.out.println("The clone set contains: " + clone_set);
}
}
输出。
The set contains: [10, 11, 12, 13, 14, 15]
The clone set contains: [10, 11, 12, 13, 14, 15, 16]
程序2
// Java Program Demonstrate clone()
// method of ConcurrentSkipListSet */
import java.util.concurrent.*;
class ConcurrentSkipListSetCloneExample2 {
public static void main(String[] args)
{
// Initializing the set
ConcurrentSkipListSet<String>
set = new ConcurrentSkipListSet<String>();
// Adding elements to this set
set.add("Gfg");
set.add("is");
set.add("fun");
// Printing elements of the set
System.out.println("The set contains: " + set);
// Cloning the ConcurrentSkipListSet
ConcurrentSkipListSet<String> clone_set = set.clone();
// Adding elements to the clone set
clone_set.add("site");
// Printing elements of the clone set
System.out.println("The clone set contains: " + clone_set);
}
}
输出。
The set contains: [Gfg, fun, is]
The clone set contains: [Gfg, fun, is, site]
参考资料 : https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#clone()