Difference between Array vs ArrayList
Arrays are fixed size
ArrayList's size auotomatically adjusted
Arrays can hold primitives and object
ArrayList can hold only objects
Arrays can be multi dimensional
ArrayList cannot be multi-dimentional
Array is a build in data structure
ArrayList is implementing class of List interface in Collection frameworkhow to compare two arraylists are equal in java
public class ArrayListExample
{
public static void main(String[] args)
{
ArrayList<String> listOne = new ArrayList<>(Arrays.asList("a", "b", "c", "d", "f"));
ArrayList<String> listTwo = new ArrayList<>(Arrays.asList("a", "b", "c", "d", "e"));
Collections.sort(listOne);
Collections.sort(listTwo);
//Compare unequal lists example
boolean isEqual = listOne.equals(listTwo); //false
System.out.println(isEqual);
//Compare equals lists example
ArrayList<String> listThree = new ArrayList<>(Arrays.asList("a", "b", "c", "d", "f"));
isEqual = listOne.equals(listThree); //true
System.out.println(isEqual);
}
}Copyright © 2021 Codeinu
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