Intellipaat’s online Java compiler is a tool that can help you write your Java codes just by using your browser without any setup or installation. It doesn’t matter if you are a beginner or experienced, this compiler will give a user-friendly interface to help you write, run, and test your codes easily on any browser.
Features of Intellipaat’s Online Java Compiler
A good compiler is really important when you are coding using the browser. Here are the key features of Intellipaat’s Online Java Compiler:
- User-friendly interface: This compiler has a user-friendly interface that makes it a great choice for beginners.
- Easy to use: Writing and testing code on this compiler is really easy.
- Accessibility: You can access this compiler anywhere. You just need an internet connection to access it.
- No installation needed: You don’t need any setup or installation to work on it because the online compile runs on the browser.
- Free tool: It is a free tool that makes it accessible for everyone.
How Online Java Compiler Works?
Here are the step-by-step instructions on how to compile and run programs in Java Compiler:
- Write Java Code: Start writing your code in a .java file.
- Compile with javac: Run the javac command on the .java file to start compiling your code.
- Bytecode Generation: The compiler will check your code to find errors and if it is correct, it will convert it into bytecode. It will be stored in a .class file.
- Run with JVM: At last Java Virtual Machine (JVM) will execute your .class file and run the program on your device.
Practice on Online Java Compiler
Online Java compiler is a great tool to run and test your Java codes without any setup or installation. It’s a user-friendly tool that is perfect for your small Java projects. Let’s start by creating a simple program in Java.
Write Your First Java Program in An Online Compiler
Let’s see step-by-step how you can write and run your Java code in an online compiler:
Step 1: Open the Intellipaat’s online Java compiler.
Step 2: Once open, type the following code in the editor.
Step 3: Click on the ‘Run’ button to execute your program.
Step 4: You will get the following output:
What is Java?
Java is an advanced object-oriented language that can help you create applications. You can run your codes on any platform using JVM (Java Virtual Machine). It is famous for its portability because you don’t need to modify your code to run it on any platform.
Java Syntax
Syntaxes play a very important role while coding. You must know all the important syntaxes in Java to write error-free code. Here are some important syntax elements that every developer should know about when writing Java codes:
Variables in Java
Variables in Java are used to store data. You can reference them and use them in your code whenever you need. Each variable has a type that tells what type of data it can store.
short x = 10; // -32768 to 32767
int x = 100; // -2147483648 to 2147483647
long x = 100000L; // -9223372036854775808 to 9223372036854775807
float x = 3.1;
double x = 31.12d;
byte x = 10; // -128 to 127
char x = 'A';
boolean x = true;
Loops in Java
Loops in Java are very important concepts that help you repeat actions in your code. There are mainly 3 types of loops in Java: for loop, while loop, and do-while loop. Let’s see what they do:
1. For loop in Java
It allows you to repeat the code for each item in a list or range.
Example:
Output:
2. While loop
It repeats the statements based on a condition. It allows you to repeat the code until the condition is true. We use a while loop when we don’t know the number of loop cycles.
Example:
int i = 0;
while (i < 5) {
System.out.print(i + " ");
i++;
}
Output:
3. Do-while loop
It also repeats the statements based on a condition and allows you to repeat the code until the condition is true. But it is mostly used when you need to run the loop at least once.
Example:
int i = 0;
do {
System.out.print(i + " ");
i++;
} while (i < 5);
Output:
Conditional Statements
Conditional Statements in Java are really important programming constructs that help you make decisions based on the conditions. The commonly used conditional statements in Java are ‘if-else’ and ‘switch’ statements. Let’s see them in detail:
1. If-else statement
if-else statement is used when there is a condition in the code and if the condition is met then the code in the ‘if’ block will be executed otherwise the code in the ‘else’ block will be executed.
Example:
int x = 5;
if (x > 10) {
System.out.println("x is greater than 10");
} else {
System.out.println("x is less than or equal to 10");
}
Output:
2. Switch statement
The ‘switch’ statement is an alternative to the ‘if-else’ statement. It is used when you have multiple conditions to check and only a single block of code will be executed based on the value of the variable.
Example:
int dayOfWeek = 2;
switch (dayOfWeek) {
case 1:
System.out.println("Monday");
break;
case 2:
System.out.println("Tuesday");
break;
case 3:
System.out.println("Wednesday");
break;
default:
System.out.println("Invalid day");
break;
}
Output:
Functions in Java
Functions are the block of codes that performs a specific task. A function is known as a method in Java. Methods are defined inside a class and you can call them whenever they are needed.
Example:
public class Main {
public static void main(String[] args) {
int result = addNumbers(5, 7);
System.out.println("The sum of the numbers is: " + result);
}
public static int addNumbers(int a, int b) {
int sum = a + b;
return sum;
}
}
Output:
Classes and Objects in Java
Classes and objects are some terms in Java. The Java language contains blueprints known as classes that specify both the attributes and methods of objects. An object is an instance of the class with specific values. It is a basic unit in OOP.
How to create a class in Java?
The ‘class’ keyword is used to create a class followed by the class name and then you add your code to define its properties.
Syntax:
class ClassName {
dataType fieldName;
void methodName() {
// Code
}
}
How to create an object in Java?
The ‘new’ keyword is used to create an object followed by the class constructor.
Syntax:
ClassName objectName = new ClassName();
How to define a method in a class?
To define a method in a class, first, you have to define access modifiers along with return type, method name, and parameters (if present) before the method body.
Example:
class Car {
void drive() {
System.out.println("The car is driving");
}
}
public class Main {
public static void main(String[] args) {
Car myCar = new Car();
myCar.drive();
}
}
Output:
Conclusion
So far we have learned about Intellipaat’s online Java compiler, its features, and how it works. We also discussed what is Java and its important syntaxes that everybody should know about. To learn more about Java and its features or you want to know in-depth about how online Java compiler works, you can check Intellipaat’s Java course.
FAQs – Online Java Compiler
1. What is an online Java compiler?
An online Java compiler is a tool that can help you write your Java codes just by using your browser. You can write, run, and test your codes easily on any browser.
2. Is Intellipaat’s online Java compiler easy to use?
Yes, Intellipaat’s online Java compiler is easy to use. It gives you a user-friendly interface where you can find everything you need to run and test your code.