Java 中的 CopyOnWriteArraySet size()方法
原文:https://www . geeksforgeeks . org/copy onwriterarrayset-size-method-in-Java/
语法:
public int size()
返回值:该函数返回当前集合中的元素数量。
以下程序说明了上述功能:
程序 1:
// Java Program to illustrate the CopyOnWriteArraySet
// size() method in Java
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// create object of CopyOnWriteArraySet
CopyOnWriteArraySet<Integer> ArrSet
= new CopyOnWriteArraySet<Integer>();
// print CopyOnWriteArraySet
System.out.println("CopyOnWriteArraySet: "
+ ArrSet);
// size value print
System.out.println("size of ArrSet: "
+ ArrSet.size());
// Add elements
ArrSet.add(32);
ArrSet.add(67);
ArrSet.add(98);
ArrSet.add(100);
// print CopyOnWriteArraySet
System.out.println("CopyOnWriteArraySet: "
+ ArrSet);
// size value print
System.out.println("size of ArrSet: "
+ ArrSet.size());
}
}
输出:
CopyOnWriteArraySet: []
size of ArrSet: 0
CopyOnWriteArraySet: [32, 67, 98, 100]
size of ArrSet: 4
程序二:
// Java Program to illustrate the CopyOnWriteArraySet
// size() method in Java
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// create object of CopyOnWriteArraySet
CopyOnWriteArraySet<String> ArrSet
= new CopyOnWriteArraySet<String>();
// Add elements
ArrSet.add("gopal");
ArrSet.add("gfg");
ArrSet.add("jgec");
ArrSet.add("sudo");
// print CopyOnWriteArraySet
System.out.println("CopyOnWriteArraySet: "
+ ArrSet);
// size value print
System.out.println("size of ArrSet: "
+ ArrSet.size());
}
}
输出:
CopyOnWriteArraySet: [gopal, gfg, jgec, sudo]
size of ArrSet: 4
版权属于：月萌API www.moonapi.com，转载请注明出处
