set modification

Author: BlcaKHat

Set_example.java

@@ -1,25 +1,28 @@
+/* implementing set.
+insertion deletion
+comparing sets with different values*/
 import java.util.*;
 public class Set_example{
 public static void main(String args[]) {
 	Scanner sc= new Scanner(System.in);
-	Set<String> new_set = new HashSet<String>();
-	Set<Integer> set1 = new HashSet<Integer>();
-	Set<Integer> set2 = new HashSet<Integer>();
-	new_set.add("vijay");
+	Set<String> new_set = new HashSet<String>(); //String object for set
+	Set<Integer> set1 = new HashSet<Integer>(); //Integer object for set1
+	Set<Integer> set2 = new HashSet<Integer>();  // set 2
+	new_set.add("vijay"); // adding values.
 	new_set.add("rohit");
 	new_set.add("kundan");
 	new_set.add("vivek");
-	new_set.add(sc.nextLine());
+	new_set.add(sc.nextLine()); // adding values to object
 
 	System.out.println("Enter the  number of elements in set A");
 	int s1 =  sc.nextInt();
 
 	for(int i=0; i< s1; i++) {
-	set1.add(sc.nextInt());
-	}
+	set1.add(sc.nextInt());   // input for set1 (performing set operation
+	}				// set value  1st
 
 	System.out.println("Enter the number of elements in set B");
-	int s2 =  sc.nextInt();
+	int s2 =  sc.nextInt();  	//input for set2
 	for(int j=0; j< s2; j++) {
 	set2.add(sc.nextInt());
 	}
@@ -31,7 +34,7 @@ public static void main(String args[]) {
 	System.out.println(set2);
 	Set<Integer> intersect = new HashSet<Integer>(set1);
 	set1.addAll(set2);
-	intersect.retainAll(set2);
+	intersect.retainAll(set2); //other functions are removeall
 	System.out.println("union of set one and set 2"+(set1));
 	System.out.println("intersection of set one and set 2"+(intersect));