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This page was exported from TechnicalStack [ http://technicalstack.com ] Export date: Sat Apr 29 17:55:55 2017 / +0000 GMT Setting classpath and Running Java Programme Setting up the path for Windows Assuming we have installed java in C:programeFilesjavajdkdirectory ->Right click on “My computer” and select “Properties: -> Click on the “Environmental variable” button under the “Advance” tab then enter the “Path” variable to C:programeFilesjavajdkbin; Setting up the path form Command Prompt:‘SETPATH'=/PATH/;C:programeFilesjavajdkbin; After this we have to set the class variable upto lib directory. Difference between Path and ClassPath ClassPath:- describes the Location where dot class(.class) files are available. Path:- describes the Location where binary executable Path is available. For eg:When we run Javac command Javac.exe gets executed and will create Java.class file Javac Test.java => Java.class file Ways to run a Java programme:We can run a java programme in the followings ways:1. With Java command to run .classfile Java JarDemo press enter 2. Java command to run . jar file Java-jarDemo.jar 3. By double clicking a jar file 4. By double clicking on batch file Batch File:- Batch file is a group of command which is saved as filename.bat Making a Batch File:Open a text file and type:- java-cpC:democlass jar Demo and this file as XYZ.bat How to cterate executable jar file Jar is a group of executable .class file. For eg. Import java.awt.*; Import java.awt.event*; Public Class JarDemo { Public Static Void main(String[] args) { Frame f=new Frame(); f.addWindowListener(new WindowAdapter{ Public Void WindowClosing(WindowEvent) { For(int i=1;i<10;i++) System.Out.Println(“I AM CLOSING WINDOWS”+I); System.exit(0); } }); f.add(newLabel(“I CAN CREATE EXECUTABLE JAR FILES ‘,' “)); f.setSize(500,500); f.setVisible(true); } } Complile the code by using the command:Javac JarDemo.java It will create two types of .class file JarDemo.class and JarDemo$1.class We can also create Manifest File which provides information about the jar file. Command:- jar-cvfm demos.jar Command to Run jar file:- Java-jar demos.jar Difference between JDK,JRE,AND J VM JDK(Java Development Kit):- JDK provides environment to develop and run the java program m e. JRE(Jav a Runtime Environment):- It provides environment to run the java programme. JVM(Java Virtual Machine):- JVM is an interpreter to run java programme line by line. JDK=JRE+development tools JRE=JVM+Library classes Post date: 2016-02-20 04:22:25 Post date GMT: 2016-02-20 04:22:25 Post modified date: 2016-08-28 15:28:45 Post modified date GMT: 2016-08-28 15:28:45 Powered by [ Universal Post Manager ] plugin. MS Word saving format developed by gVectors Team www.gVectors.com