Java Syntax

Java syntax

Created By: chatGPT

In Java, the syntax is characterized by a set of rules that dictate how code should be written and interpreted. Understanding the syntax is crucial for writing properly functioning Java programs.

Variables in Java are used to store data values. You must declare a variable before you can use it.

int number;
String text;
boolean isTrue;

Data types specify the size and type of the data. Common data types in Java include int, double, char, and boolean.

double price = 19.99;
char initial = 'A';
boolean isActive = true;

Java uses control statements to control the flow of execution. Common control statements include if, else, for, and while.

if (number > 10) {
    System.out.println("Number is greater than 10");
} else {
    System.out.println("Number is 10 or less");
}

You can define methods in Java to encapsulate functionality. Methods can have parameters and return values.

public int add(int a, int b) {
    return a + b;
}

public void printMessage(String msg) {
    System.out.println(msg);
}

Classes are a fundamental part of Java's object-oriented structure. They define the properties and behaviors of objects.

public class Car {
    String color;
    int year;

    public void drive() {
        System.out.println("The car is driving");
    }
}

You can create objects from classes. This allows you to use the defined properties and methods.

Car myCar = new Car();
myCar.color = "Red";
myCar.year = 2020;
myCar.drive();

Java also supports exception handling using try, catch, and finally blocks. This helps in managing runtime errors gracefully.

try {
    int result = 10 / 0; // This will cause an exception
} catch (ArithmeticException e) {
    System.out.println("Cannot divide by zero!");
} finally {
    System.out.println("This will always execute.");
}

Comments in Java are used to annotate your code for better readability. You can add single-line and multi-line comments.

// This is a single-line comment
/* This is a multi-line comment
   that spans multiple lines */