The clear() method of CopyOnWriteArrayList erases all the elements in the list. The size of the list becomes zero after the function is called.
Syntax:
public void clear()
Parameters: The function does not accept any parameters.
Return Value: The function does not returns anything.
Below programs illustrate the above function:
Program 1:
// Java Program to illustrate the CopyOnWriteArrayList// clear() method in Javaimport java.util.concurrent.CopyOnWriteArrayList;import java.util.*; public class GFG { public static void main(String[] args) { // create object of CopyOnWriteArrayList CopyOnWriteArrayList<Integer> ArrLis = new CopyOnWriteArrayList<Integer>(); // Add elements ArrLis.add(32); ArrLis.add(67); ArrLis.add(98); ArrLis.add(100); // print CopyOnWriteArrayList System.out.println("CopyOnWriteArrayList: " + ArrLis); ArrLis.clear(); System.out.println("CopyOnWriteArrayList: " + ArrLis); }} |
Output:
CopyOnWriteArrayList: [32, 67, 98, 100] CopyOnWriteArrayList: []
Program 2:
// Java Program to illustrate the CopyOnWriteArrayList// clear() method in Javaimport java.util.concurrent.CopyOnWriteArrayList;import java.util.*; public class GFG { public static void main(String[] args) { // create object of CopyOnWriteArrayList CopyOnWriteArrayList<String> ArrLis = new CopyOnWriteArrayList<String>(); // Add elements ArrLis.add("gopal"); ArrLis.add("gfg"); ArrLis.add("jgec"); ArrLis.add("sudo"); // print CopyOnWriteArrayList System.out.println("CopyOnWriteArrayList: " + ArrLis); ArrLis.clear(); System.out.println("CopyOnWriteArrayList: " + ArrLis); }} |
Output:
CopyOnWriteArrayList: [gopal, gfg, jgec, sudo] CopyOnWriteArrayList: []
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArrayList.html#clear–
