The class keyword is used to create a class in Java. A class contains variables, methods, etc. A java code cannot execute without a class.
Notes:
- The file in which java code is stored must match with the class name that contains main method.
- Class name is unique and cannot be duplicated inside same package.
- A java file can contain more than one classes, however the file name must match the class that contain the main method.
Example of class keyword
Here, we are using class keyword to create a class. This class has a variable and a method. These can be accessed by creating an object of this class as shown below:
//class name is "JavaExample"
public class JavaExample {
int i = 101;
public void hello(){
System.out.println("Hello");
}
public static void main(String[] args) {
//creating an object of JavaExample
JavaExample obj = new JavaExample();
//accessing class variable
System.out.println(obj.i);
//accessing method of the class
obj.hello();
}
}
Output:
101 Hello