Object Oriented Programming - 3. Java Programming
- 1. Object Oriented Programming Andi Nurkholis, S.Kom., M.Kom. Study Program of Informatics Faculty of Engineering and Computer Science SY. 2019-2020 March 2, 2020
- 3. Java History Java is an object-oriented programming language developed by James Gosling and colleagues at Sun Microsystems in the early 1990s. Java was started as a project called "Oak" by James Gosling in June 1991. Gosling’s goals were to implement a virtual machine and a language that had a familiar C-like notation but with greater uniformity and simplicity than C/C++. The first public implementation was Java 1.0 in 1995. 3
- 4. 4 Java Structure An overview of the software development process
- 5. Java Virtual Machine Through the Java VM, the same application is capable of running on multiple platforms. 5
- 6. Java Platform The Java platform has two components: • The Java Virtual Machine • The Java Application Programming Interface (API) 6
- 7. What Can Java Technology Do? The general-purpose, high-level Java programming language is a powerful software platform. Every full implementation of the Java platform gives you the following features: • Development Tools • Application Programming Interface (API) • Deployment Technologies • User Interface Toolkits • Integration Libraries 7
- 8. Variable An item of data named by an identifier. Each variable has a type, such as int or Object, and a scope. See also class variable, instance variable, local variable. 8 Keyword Data Type Identifier public private protected int float char number value alphabet
- 9. Keyword The Java(TM) programming language sets aside words as keywords - these words are reserved by the language itself and therefore are not available as names for variables or methods. 9
- 10. Public A Java(TM) programming language keyword used in a method or variable declaration. It signifies that the method or variable can be accessed by elements residing in other classes 10
- 11. Private A Java(TM) programming language keyword used in a method or variable declaration. It signifies that the method or variable can only be accessed by other elements of its class 11
- 12. Protected A Java(TM) programming language keyword used in a method or variable declaration. It signifies that the method or variable can only be accessed by elements residing in its class, subclasses, or classes in the same package 12
- 13. Data Type The Java programming language is statically-typed, which means that all variables must first be declared before they can be used 13 Data Type Default Value Byte 0 Short 0 Int 0 Long 0L Float 0.0f Double 0.0d Char ‘u0000’ String Null boolean False int gear = 1;
- 14. 14 Identifier The name of an item in a program written in the Java(TM) programming language
- 15. Operator Operator is a sign used to carry out an operation. There are several types of operators that can be used, namely: • Arithmetic • Assignment • Relational • Logic 15
- 16. Thank You, Next … Control Structure Study Program of Informatics Faculty of Engineering and Computer Science SY. 2019-2020 Andi Nurkholis, S.Kom., M.Kom. March 2, 2020