Java Online Practice Test on Java Language Fundamentals like Java Data Types, Java Variables, Operators, Java Control Flow, and Java OOPS. Introduction to Java Programming. Java Language Elements, Java Modifiers, Data Types, Variables, Operators, Conditional Statements, Loop Statements, IO Operations, Methods, and Exception Handling. Java Object-Oriented Programming Fundamentals, Inheritance, Polymorphism, Abstraction and Encapsulation. Write Comments … Read more
Types of Output in Java Programming, Value bases Result in Java, Boolean Result in Java, Constant based Result in Java, and Dynamic Result in Java. Java Input and Output Operations Read user input Read data from files Write program output on the console Write data or output in files Types of Output/Result in Java The … Read more
Abstraction in Java, Java Object-Oriented Programming, Abstract Class, Abstract Methods, Java Interfaces, and Inheriting Abstract classes. Java Abstraction Four principles of Java object-oriented program, 1. Inheritance 2. Polymorphism 3. Abstraction 4. Encapsulation Java Object-Oriented Programming – Abstraction Abstraction is a Process of hiding implementation details and showing only functionality to the user. Two types of Methods … Read more
Polymorphism in Java, Java Object-Oriented Programming, Method Overloading, Method Overriding, Compile tin & Run-time Polymorphism in Java. Polymorphism in Java is a concept by which we can perform a single action in different ways. Polymorphism is derived from 2 Greek words: poly and morphs. The word “poly” means many and “morphs” means forms. So polymorphism … Read more
Exception Handling in Java, What is Exception handling, Types of exceptions in Java, Java Program Run-time Errors, and Java try-catch block. Java Exception Handling Dictionary Meaning: Exception is an abnormal condition. What is an Exception in Java? An exception is a problem that arises during the execution of a program. When an Exception occurs the … Read more
Java Object Oriented Programming, Class, Object, Method, Java Inheritance, Polymorphism in Java, Java Abstraction, and Java Encapsulation. Procedural programming is about writing procedures or methods that perform operations on the data, while object-oriented programming is about creating objects that contain both data and methods. Simula is considered the first object-oriented programming, Smalltalk is considered the … Read more
File Handling in Java, Java Input and Output operations, handling text files, create a file, read a file, write a file, and compare two files. File Handling in Java permits us to create, read, update, and delete the files, which are stored on the local file system. File (Text File) Handling in Java User Point … Read more
User-Defined Methods in Java, Java Static and Non-static methods, Java method with return a value, and java method without return a value. Java Built-in methods – String methods, Array methods, Number methods, and character methods. User Defined Methods in Java i) Introduction to Java Methods ii) Types of Methods iii) User defined Methods ———————————– i) … Read more
Reading User Input, Java User Input, Java Output, Java Scanner Class, Java System Class, Java File Handling, and Java Database Connectivity. Reading User Input in Java 1. Reading User Input The Scanner class is used to get user input and it is available in java.util package To use the Scanner class, create an object of the … Read more
Arrays in Java, What is Array in Java, Declare Arrays, Java Array built-in methods, advantages of Java Arrays, and Drawbacks of Java Arrays. Java Arrays • In Java, Array is an Object that holds a fixed number of values of a single data type • The length of the Array is established when the Array is … Read more