Java Collection provides an architecture to store and manipulate the group of objects. Here we will see how to compare Elements in a Collection in Java.
Steps:
- Take both inputs with help of asList() function.
- Sort them using Collections.sort() method.
- Compare them using equals() function.
- Print output. (true means both are equal and false means both are different)
Example 1:
Java
// Java program implementing// Comparing elements of Collections  import java.util.*;import java.io.*;  public class ArrayCompareExample {      // main function accepting string arguments    public static void main(String[] args)    {        // create listA        ArrayList<String> listA            = new ArrayList<>(Arrays.asList("a", "b", "c"));          // create listB        ArrayList<String> listB            = new ArrayList<>(Arrays.asList("a", "b", "d"));          // sorting both lists        Collections.sort(listA);        Collections.sort(listB);          // Compare lists using        // equals() method        boolean isEqual = listA.equals(listB);          // print output on screen (true or false)        System.out.println(isEqual);    }} |
Output
false
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Example 2:
Java
// Java program implementing// Comparing elements of Collections  import java.util.*;import java.io.*;  public class ArrayCompareExample {      // main function accepting string arguments    public static void main(String[] args)    {        // create listA        ArrayList<Integer> listA            = new ArrayList<>(Arrays.asList(3, 4, 5));          // create listB        ArrayList<Integer> listB            = new ArrayList<>(Arrays.asList(4, 5, 3));          // sorting both lists        Collections.sort(listA);        Collections.sort(listB);          // Compare lists using        // equals() method        boolean isEqual = listA.equals(listB);          // print output on screen (true or false)        System.out.println(isEqual);    }} |
Output
true
