So you are new in programming and dream of making it in this realm. You probably have the basic programming knowledge or are just starting. No matter the level you are at, we got you.
You might have heard a lot about conditional statements in Java. It may be a bit confusing initially, but worry not; we are here to explain these concepts and more. And trust me, once you practice it a few times, you will be unstoppable in the programming realm.
A conditional statement is a fundamental concept in coding. It is a logical statement consisting of a hypothesis and a conclusion.
In this blog, we will learn all about conditional statements and the definition and negation of conditional statements in Java. We will also learn their importance in the coding world and their applications in programming.
Moreover, we will learn how verifying these statements work and interact with classes and objects in Java.
So, let's dive straight into the realm of conditional statements and understand their significance in the realm of Java and programming.
What are Conditional Statements?
Conditional statements in Java and other languages are essential structures in programming that provide the necessary control to the flow of code, which is based on several conditions. Hence named Conditional statements.
These conditional statements help the coders do certain actions and processes, including executing commands, changing the program's functionality, and much more.
There are 4 common types of conditional statements. These are:
If-then Statement: If the “if” condition is true, the program executes a block of code. If the condition is false, the block of code is altogether skipped.
Let’s make it more understandable with an example.
Let’s take this sentence and write them in the if-then format.
All cows produce milk
Now we can write this in the if-then format:
If an animal is a cow, then it will produce milk.
If-Else Statement: This is similar to the “if-then” statement. If the “if” condition is true in the statement, it processes the block of code assigned to the “if” statement, and if the condition is not true, it executes another block of code that is assigned to the “else” statement.
Nested If-Else Statement: This is a complex statement involving several “if” and “else” statements nested inside each other. This creates a more diverse scenario, and the decision-making becomes very complex.
Switch Statement: This statement improves the Nested If-Else statement as it provides an alternative to multiple “if-else” statements. This statement becomes applicable when there are many conditions to check and verify.
The statement analyses the given expression and looks for matches with one of the many specified cases. If there is a match, the block of code assigned to it is executed.
Now that we are familiar with the concept of conditional statements in Java and other languages and its types let’s learn more about the Definition & Negation and Verifying statements.
What are Negation and Verifying Statements?
Let’s dive into the realm of these statements and understand each of them.
Negation Statements
The negation statement implies the opposite of the original statement. In simple terms, negation statements use false statements and flip them to make them true.
The same applies to false statements made true by the negation statements. It is an important and fundamental way to change your code based on the opposite conditions of your original code.
Let us demonstrate this concept with an example.
Suppose you are working with a statement that says “if it's cold,” the negation of this statement would be “if it's not cold.” Another example is if a statement is “ If it is a cow”, the negation would be “If it is not a cow”.
Negation is a very useful trick that you can have. This gives that flexibility and allows you to be more confident while handling different scenarios.
Verifying Statements
Conditional statements can only be true or false. Verifying statements act as double-checking the code. For a conditional statement to be false, you must give at least one example that renders it false. If the statement has to be proven true, there must be a proof of conclusion every time the hypothesis is true.
In simple terms, Verifying statements acts as a magnifying glass. They check the set conditions for the written program and also check the expected functionality of this program. By doing this, verifying statements ensures that the right block of code gets executed.
Let us make it clearer with an example
Suppose you have provided a conditional statement saying, “If the user has signed up.” A verifying statement in this context will look at the info given by the client, check that info for correctness, and then confirm if the user has indeed signed up before it moves along the process to the next code block.
Let’s move on to the next part of this blog, i.e., the classes and objects in Java.
What are the Classes and Objects in Java?
Classes and Objects in Java are fundamentals of Object Oriented Programming (OOPs). These are important in representing concepts and entities of real-world concepts.
Let us learn more about these concepts in detail.
Classes in Java
Think of a class in Java as a set template used to define the behavior and properties of objects in the real world. It comprises the set of data that defines the functionality related to that specific object.
Suppose you were writing a program to represent aeroplanes; you might have an “aeroplane” class that defines the attributes (e.g., type, carrier capacity, year of first flight) and behaviors (e.g., taking off, landing) that all aeroplanes share.
Here are some properties that are associated with the Java Classes:
- Class is just a blueprint from which objects are created and is not a real-world entity.
- Class does not hold memory.
- A class is a collection of variables of various data kinds as well as a collection of methods.
- A Class in Java can contain the following:
- Method
- Data Member
- Interface
- Nested Class
- Constructor
Objects in Java
In Java, an object is a fundamental unit of OOP that represents things in the real world. Objects are instances of a class that are produced to utilize a class's properties and methods.
A single Java program typically has many objects, which interact by executing methods. An object in Java is made up of the following parts:
- State: The state of the object refers to its properties.
- Behavior: The behavior of the object refers to the response and interaction of the object towards other objects.
- Identity: The object's identity allows it with a specific name to respond and interact with other objects.
Suppose a “car” class defines attributes like company, model, and year and a method to introduce a car. Creating a “Car 1” object with company “Ford,” model GT and year 2020. This is the object of the car class, and when the command is executed, it may output as “ Ford GT 2020 edition.”
Conclusion
In conclusion, Conditional statements in Java are a must-have tool for programmers. Deep knowledge of their definition, negation, and verifying capabilities is paramount for programming, especially in Java.
Furthermore, Classes and Objects in Java are the building blocks of Object Oriented Programming. These are important in representing concepts and entities of real-world concepts.
Possessing the knowledge and utility of these concepts is a surefire way to build your confidence and skill set and climb the ladder toward your dream position.
