![First Hello World Program
HelloWorld.java
public class HelloWorld {
public static void main(String args[]) {
System.out.println(“Hello World Java Program”);
}
}](https://image.slidesharecdn.com/basicsofjava1-160421104127/85/Basics-of-java-8-320.jpg)
Basics of java
- 2. History ● Most of the character of Java is inherited from two languages. From C, Java derives its syntax. Many of Java’s Object - Oriented features were influenced by C++. ● Java was started as a project by James Gosling, Patrick Naughton, Chris Warth, Ed Frank and Mike Sheridan at Sun Microsystems, Inc. in 1991. ● This language was initially called “Oak”, but was renamed as “Java” in 1995.
- 3. Characteristics Of Java ● Portable ● Security ● Object Oriented ● Robust ● Multithreaded ● Architecture Neutral ● Distributed ● Dynamic
- 5. JVM (Java Virtual Machine) Bytecodes are the machine language of the Java virtual machine. JVM (Java Virtual Machine) is an abstract machine. It is a specification that provides runtime environment in which java bytecode can be executed.
- 6. JDK (Java Development Kit) The Java Development Kit (JDK) is a software development environment used for developing Java applications and applets. It includes the Java Runtime Environment (JRE), an interpreter/loader (java), a compiler (javac), an archiver (jar), a documentation generator (javadoc) and other tools needed in Java development.
- 7. JRE (Java Runtime Environment) The Java Runtime Environment (JRE), also known as Java Runtime, is part of the Java Development Kit (JDK), a set of programming tools for developing Java applications. The Java Runtime Environment provides the minimum requirements for executing a Java application; it consists of the Java Virtual Machine (JVM), core classes, and supporting files.
- 8. First Hello World Program HelloWorld.java public class HelloWorld { public static void main(String args[]) { System.out.println(“Hello World Java Program”); } }
- 9. Compile And Execute ● Set JAVA path and classpath ● Compile javac HelloWorld.java java HelloWorld
- 10. Java - Decision Making The if Statement Syntax : if(condition) Statement; else Statement; Example : if (num < 100) System.out.println(“Number is less than 100”); else System.out.println(“Number is greater than 100”)
- 11. Java - Loop Control The For Loop for (initialization; condition; iteration) statement; Example : int x; for (x = 0; x < 10; x = x + 1) { System.out.println(“Current Value of X: ” + x); }