1. As long as your objects implement equals, you can use the Stream API to get a distinct set of values, and if that distinct count is 1, they are all the same. boolean allEqual = Stream.of (obj1, obj2, obj3).distinct ().count () == 1. Share. Improve this answer. Follow. Using the equals() method, we create two objects from the main method by giving identical data and comparing the results. This software returns false because the Object class' equals() method only returns true if the references to the objects are identical. Example code for overriding the equals method: EqualsExpl.java Check if a1 is equal to a2 : false Check if a2 is equal to a3 : false Check if a1 is equal to a3 : true We can even use deepEquals() to test the equality of array of Object of the user define class. Refer to the example below We should override the equals method to define the equality of the different parameters in a user defined class. In Java, the equals() the method is used to determine if two objects are equal. It is defined in the Object class, which is the root of the Java class hierarchy, and it is inherited by all Java Equals and HashCode Interview questions in Java. Here is my list of 10 interesting questions on both of these methods. I have seen, programmer struggles to write equals () and hashCode () by hands, for a rich class, which contains different data types e.g. int, float, date, etc. Reading those items and trying examples will give you enough How to use equals() and equalsIgnoreCase() in Java - The equals() methodThis method compares this string to the specified object. The result is true if and only if the argument is not null and is a String object that represents the same sequence of characters as this object.Exampleimport java.lang.*; public class StringDemo { public static void m The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true). If you want to check equality with equals () method in your class equal you have If you need to write your own equals methods, you should always override canEqual if you change equals and hashCode. NEW in Lombok 1.14.0: To put annotations on the other parameter of the equals (and, if relevant, canEqual) method, you can use onParam=@__({@AnnotationsHere}). Be careful though! This is an experimental feature. F77zNWX.