Java 中的 CopyOnWriteArraySet remove()方法
原文:https://www . geeksforgeeks . org/copy onwriterarrayset-remove-method-in-Java/
copy onwriterarrayset的 remove() 方法移除集合中存在的指定元素。
语法:
public boolean remove(Object o)
参数:该功能接受一个强制参数 o ，该参数指定要从集合中移除的元素(如果存在)。
返回值:如果集合包含指定元素，则函数返回真。
以下程序说明了上述功能:
程序 1:
// Java Program to illustrate the
// remove() 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>();
// Add elements
ArrSet.add(32);
ArrSet.add(67);
ArrSet.add(98);
ArrSet.add(100);
// print CopyOnWriteArraySet
System.out.println("CopyOnWriteArraySet: "
+ ArrSet);
// Remove using remove() function
if (ArrSet.remove(100))
System.out.println("Set after removal"
+ " of 100 is: "
+ ArrSet);
else
System.out.println("100 is not present");
}
}
输出:
CopyOnWriteArraySet: [32, 67, 98, 100]
Set after removal of 100 is: [32, 67, 98]
程序二:
// Java Program to illustrate the
// isEmpty() 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("geeks");
ArrSet.add("geeks");
ArrSet.add("technical");
// print CopyOnWriteArraySet
System.out.println("CopyOnWriteArraySet: "
+ ArrSet);
// Remove using remove() function
if (ArrSet.remove("scripter"))
System.out.println("Set after removal"
+ " of 'scripter' is: "
+ ArrSet);
else
System.out.println("'scripter' is not present");
}
}
输出:
CopyOnWriteArraySet: [gopal, geeks, technical]
'scripter' is not present
版权属于：月萌API www.moonapi.com，转载请注明出处
