Aug 21, 2016 · I know that to check if it is equal we can type string.equals ("ABC") but how do I do it when I want to check if it is not equal? You need to read a basic tutorial. Simply negate the result of equals: String.equals returns a boolean value, to get the inverse of any boolean value, use the ! operator:

Mar 11, 2025 · This article explores the concept of not equals in Java, focusing on the `!=` operator and the `.equals()` method. Learn how to effectively compare both primitive types and objects, and understand the key differences for better programming practices.

invoke .equals() on constants when possible, in order to avoid a NullPointerException (using PAPER.equals(player1)) All in all, your code would look like: if (!ROCK.equals(player1) && !PAPER.equals(player1) && !SCISSORS.equals(player1))

Dec 3, 2011 · "Not equals" can be expressed with the "not" operator ! and the standard .equals. Just put a '!' in front of the boolean expression. If the class implements comparable, you could also do. doesn't use a !, though not particularly useful, or readable....

Jan 17, 2020 · In this article, we will show you a Java not equal Example. Firstly we will talk about what is != in Java general, and for what reason we use it. After that, we will do some examples of how we use it.

In Java, Not Equal Relational Operator is used to check if left operand is not equal to second operand. In this tutorial, we will learn how to use the Not Equal Operator in Java, with examples. The symbols used for Not Equal operator is != .

Nov 7, 2023 · In Java, the '!=' operator is used to check if two values are not equal, for example if (x != y) {System.out.println("x and y are not equal");. It’s a comparison operator that returns true if the values on either side of it are unequal.

Jun 22, 2023 · The most common and recommended way to say “does not equal” in Java is by using the not equal operator “!=”. This operator compares two values and returns true if they are not equal, and false if they are equal.

Nov 23, 2020 · A quick guide to compare strings using != and equals() method in java. Examples on string != java and string.equals("java").

In this post, I will be sharing not equal example in Java. Before moving on to the examples, first, we will understand how do you write the not equals sign in Java, what is != operator, the difference between != and !a.equals(b).