What would be the output generated by the following code? import java.util.concurrent.*; public class Main { public static void main(String[] args) ConcurrentHashMap chm = new ConcurrentHashMap (); chm.put(1, "Welcome"); chm.put (2, "to"); chm.put (3, "Java"); chm.put (4, "World"); chm.putIfAbsent(3, "World"); System.out.println("Elements: "+ chm); chm.remove (2, "Welcome"); System.out.println("Elements after key 2 is removed: "+chm); chm.putIfAbsent (3, "Java's"); System.out.println("Add new: "+chm); chm.replace (3, "Java", "Java New"); System.out.println("After Replacing: "+ chm);

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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What would be the output generated by the following code?
import java.util.concurrent.*;
public class Main {
public static void main (String[] args)
{
new ConcurrentHashMap ();
ConcurrentHashMap chm =
chm.put (1, "Welcome");
chm.put (2, "to");
chm.put (3, "Java");
chm.put (4, "World");
chm.putIfAbsent (3, "World");
System.out.println("Elements: "+ chm);
chm.remove (2, "Welcome");
System.out.println ("Elements after key 2 is removed: "+chm);
chm.putIfAbsent (3, "Java's");
System.out.println ("Add new: "+chm);
chm.replace (3, "Java", "Java New");
System.out.println ("After Replacing: "+ chm) ;
}
Transcribed Image Text:What would be the output generated by the following code? import java.util.concurrent.*; public class Main { public static void main (String[] args) { new ConcurrentHashMap (); ConcurrentHashMap chm = chm.put (1, "Welcome"); chm.put (2, "to"); chm.put (3, "Java"); chm.put (4, "World"); chm.putIfAbsent (3, "World"); System.out.println("Elements: "+ chm); chm.remove (2, "Welcome"); System.out.println ("Elements after key 2 is removed: "+chm); chm.putIfAbsent (3, "Java's"); System.out.println ("Add new: "+chm); chm.replace (3, "Java", "Java New"); System.out.println ("After Replacing: "+ chm) ; }
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