Trending September 2023 # Types Of Java Boolean Value With Examples # Suggested October 2023 # Top 18 Popular

You are reading the article Types Of Java Boolean Value With Examples updated in September 2023 on the website Lanphuongmhbrtower.com. We hope that the information we have shared is helpful to you. If you find the content interesting and meaningful, please share it with your friends and continue to follow and support us for the latest updates. Suggested October 2023 Types Of Java Boolean Value With Examples

Introduction on Java Booleans

In day to today life, we often make decisions about each of our activities, situations, visions, results, happenings, etc. The value of our decision is either of the twofold: yes or no; true or false; on or off; go or no-go etc. Programming does not fall under any exception. In programming, based on our core logic and use cases, we need to make decisions and based on those decisions; we need to write code accordingly. As a programming language, Java is not an exception and allows us to provide a special data type called “Boolean” to use them in our code for decision-making purposes. A Java Boolean variable or A Boolean expression can take either of the two values: true or false.

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

Let us discuss about Booleans from a java programming perspective.

Types of Java Boolean Value

Following are the different types of Java Boolean Value:

1. Keyword Boolean with Variable Names

You only have two options with you regarding the values of a Boolean type variable in java. Value to a Boolean type is either true or false. There is no other option available. You need to use keyword Boolean along with variable names and assign the value (true or false) to it.

Syntax:

For example:

boolean bool = true, where bool is the variable name and associated with value as true

boolean bool2 = false, where bool is the variable name and associated with value as false

Code Example 1:

public class BooleanInJava { public static void main(String[] args){ boolean bool = true ; boolean bool2 = false; System.out.println(bool); System.out.println(bool2); } }

Output:

2. Boolean Type Variable

What if you provide values other than true or false to a Boolean type variable?

For example:

boolean bool = 1 ;

boolean bool2 = 0;

You will get an error for this.

Code Example 2:

public class BooleanInJava { public static void main(String[] args) { boolean bool = 1 ; boolean bool2 = 0; System.out.println(bool); System.out.println(bool2); } }

Output:

3. Feature of Boolean

Now, how to use this feature of Boolean effectively?

We can use it to make decisions in our program. I mean to say that you can use to test some deciding factors in your program by using conditional operators to get or print a Boolean value. This is testing of condition of a Boolean Expression. The program will evaluate this expression, and a decision will be given accordingly.

Let us have some examples:

Code Example 3:

public class BooleanInJava { public static void main(String[] args) { int num1 = 10; int num2 =11; System.out.println(num1 < num2); System.out.println(num2 <num1); } }

Output:

How Boolean Value Works?

Symbol of Boolean operators Name of the corresponding Symbol

| OR

& AND

^ XOR

! NOT

!= NOT EQUAL

&& Short circuit AND

|| Short circuit OR

== EQUAL

Please check the table for your understanding of how evaluation is happening in Boolean expressions. This understanding is very important to clear your concepts:

Variables/Boolean Expressions num1 num2 num1&num2 num1^num2 !num1 !num2

Values/Result of evaluations

true true true true false false false

true false true false true false true

false true true false true true false

false false false false false true

true 4. Public Class

Code Example 4:

public class BooleanInJava { public static void main(String[] args) { boolean num1 = true; boolean num2 = false; System.out.println("num1&num2 = "+(num1&num2)); System.out.println("num1^num2 = "+(num1^num2)); System.out.println("!num1 = "+(!num1)); System.out.println("!num2 = "+(!num2)); } }

Let us see some more code examples.

5. Boolean Operators

Code Example 5:

Here we will compare two Boolean variables and assign values to them and then create Boolean expression for those using Boolean operators and then print them to see the final output.

public class BooleanInJava { public static void main(String[] args) { boolean num1 = true; boolean num2 = false; boolean num3=(num1==num2); System.out.println(num1); System.out.println(num2); System.out.println(num3); } }

Output:

6. Boolean Objects.

Code Example 6:

Here we will compare two Boolean objects.

public class BooleanInJava { public static void main(String[] args) { boolean boolObj1=new Boolean("TRUE"); boolean boolObj2=new Boolean("FALSE"); boolean boolObj3=new Boolean("FALSE"); boolean decision=(boolObj1==boolObj2); System.out.println("Are the value of boolean objects 1 and 2 equal? "+decision); boolean decision2=(boolObj3==boolObj2); System.out.println("Are the value of boolean objects 2 and 3 equal? "+decision2); } }

Output:

Conclusion – Java Boolean

All of the comparisons and conditions in Java are primarily based on Boolean expressions; hence you need to use them in an effective manner. In this topic, you have learned about many aspects of Boolean values but, you need to use them effectively based on your business/ client requirements and use cases.