1.

Write a program to shuffle all the elements of a collection in Java.

Answer»

We use the shuffle() method of the Collections class. 

//importing the required header filesimport java.util.ArrayList;IMPORT java.util.Collections;import java.util.LIST;public class Shuffle_collection { public static void main(String[] argv) THROWS EXCEPTION { ArrayList<String> array_list = new ArrayList<String>();//creating an arraylist of strings array_list.add("Monday"); array_list.add("Tuesday"); array_list.add("Wednesday"); array_list.add("Thursday"); array_list.add("Friday"); array_list.add("Saturday"); array_list.add("Sunday"); Collections.shuffle(array_list);//shuffling the arraylist System.out.println("The shuffled ARRAY list is as follows : " + array_list);//printing the shuffled array list } }

Output:

The shuffled array list is as follows : [Thursday, Friday, Saturday, Wednesday, Tuesday, Sunday, Monday]


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