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Java program structure
The document discusses the structure of a Java program. A Java program contains classes, with one class containing a main method that acts as the starting point. Classes contain data members and methods that operate on the data. Methods contain declarations and executable statements. The structure also includes sections for documentation, package statements, import statements, interface statements, and class definitions, with the main method class being essential.
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Introduction to the Java Program structure, including classes, methods, and essential components like main method, documentation, package, import statements, and interfaces.
Java program structure
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- 2. A JavaProgram may contain many classes of which only one class defines a main method . Classes contain data members and methods that operate on the data members of the class. Methods may contain data type declarations and executable statements.
- 3. DocumentationSection: The documentation sectioncomprises a set of comment lines giving the name of the program. Comments must explain why and what of classes and how of algorithms. Java also uses a third style of comment/**….*/ known as documentation. Package Statement: This Statement declares a package name and informs the compiler that the classes defined here belong to this package. Example : package student; The Package statement is optional.
- 4. ImportStatements: This is similarto #include Statement in C. import student. test; This Statement instructs the interpreter to load the test class contained in the package student. InterfaceStatements: An interface is like a class but include a group of method declarations. This is also an optional section and is used only when we wish to implement the multiple inheritance feature in the program.
- 5. Class Definitions: A JavaProgram may contain multiple class definitions. Classes are primary and essential elements of a Java Program. Main Method Class: A Main method as its starting point, this class is the essential part of a Java Program. A Simple Java Program may contain only this part. The main method creates objects of various classes and establishes communication between them.