Weka - Data mining Tool   W eka is a tool for big data and data mining. It is used to various classification, experiments, and analysis over large data sets.   Installation Guide -weka    You can download Weka from   here   and follow the normal installation procedure. After completion you will get following window, here you can begin your classification or experiment on different data sets with Weka.       
  1. First program    Install java and Eclipse Then follow the Steps:  File-New-Java Project- Enter  Project Name- Finish  Go to Project Name you Entered -File-New Class- Application   public class Application {                                        //Class name same as java file name   public static void main(String[] args) {           //Main method    String text ="Hello World !";                 //String data type    System.out.println(text);                        //print method   }  }       OUTPUT:    Hello World !