ROBOT.LK

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package edu.learn.upload.virus.scanner;

import java.io.IOException;
import java.util.Scanner;

public class VirusScanner {
        public static String fileScanner(String path) {
                String fileStatus = "";
                try 
                {
                        Process process = Runtime.getRuntime().exec("C:/Progra~1/ClamWin/bin/clamscan.exe " + path);
                        Scanner scanner = new Scanner(process.getInputStream());
                        while(scanner.hasNextLine()){
                                String status = scanner.nextLine();
                                if((status.lastIndexOf(":",1)) != -1){
                                        fileStatus = status.substring(status.lastIndexOf(":") + 1);
                                        System.out.println("Filename: " + status.substring(0, status.lastIndexOf(":")) + "\nStatus: " + status.substring(status.lastIndexOf(":") + 1));
                                }
                        }
                }
                catch (IOException e) {
                        e.printStackTrace();
                }
                
                if(fileStatus.trim().toLowerCase().equals("ok")){
                        return  "OK";
                }else{
                        return fileStatus.trim().toLowerCase();
                }
        }
        
        public static void main(String[] args) {
                System.out.println(fileScanner("C:/temp/add_state_reuse.txt"));
        }
}

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class ArrayTable{
	public static void main(String args[]){
        
		System.out.println("Index \tValue");
		int array[] ={1,2,3,4,5,6,7,8};
        
		for(int counter = 0; counter < array.length; counter++ ){
            
			System.out.println(counter + "\t" + array[counter]);
            
		}
	}
}

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      public static void main(String[] args) {
                System.out.println(fileScanner("C:/temp/add_state_reuse.txt"));
        }

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public class VirusScanner {
        public static String fileScanner(String path) {
                String fileStatus = "";    // can't understand this ? 
                try // creates a try block 
                {
                        Process process = Runtime.getRuntime().exec("C:/Progra~1/ClamWin/bin/clamscan.exe " + path);
                        // the return value of the right hand side will be stored in the process.
                        // so you have to , read the what is 'Process' first. 
                        // Here is the API for that class http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/Process.html

                        // then go to the expression , Runtime.getRuntime().exec() function is caleld with that parameter.

                         // so what's Runtime , Just search on API,
                         // API DOC : http://docs.oracle.com/javase/6/docs/api/java/lang/Runtime.html#getRuntime%28%29
                        // so Here is the API for getRuntime() is a static method in that class, so you 
                        // call that function without making a object.
                        // http://docs.oracle.com/javase/6/docs/api/java/lang/Runtime.html#getRuntime%28%29
                        
                         // so it will return a Runtime Object. and that .exec() function will call.
                         // so we need to refer to the API of Runtime class's exec() method.
                         // API : http://docs.oracle.com/javase/6/docs/api/java/lang/Runtime.html#exec%28java.lang.String%29

                        // so to that function it will pass the string parameter.
                        // path is now path= "C:/temp/add_state_reuse.txt" and there is a string concatration in the 
                        // line. so parameter that will be passed to exec() will be 
                        // "C:/Progra~1/ClamWin/bin/clamscan.exe  C:/temp/add_state_reuse.txt"
                        
                       //  so finally you can understand the line. It just create a new process 
                       // with command line parameter.

                        Scanner scanner = new Scanner(process.getInputStream());
                        // likewise review the appropriate API docs. If you unfamiliar , which means it's
                        // necessary to read it. More reading more skills will rise up, Believe me.
                        // Scanner class , and Process's (type of object process ) getInputStream() method API.
                        
                        while(scanner.hasNextLine()){
                                // when you analyzing a while loop divide it to two logical parts,
                                // when will the termination condition will met, you can see it will
                                // exit the loop when there is no more lines to process.

                                // then flawn back to the loop context.
                                // what it does? Can you tell me?
                                // I could tell what it does without reviewing any API, believe me experience will
                                // made you to that[anyway I'm not that much of experienced].
                                String status = scanner.nextLine();
                                if((status.lastIndexOf(":",1)) != -1){
                                        fileStatus = status.substring(status.lastIndexOf(":") + 1);
                                        System.out.println("Filename: " + status.substring(0, status.lastIndexOf(":")) + "\nStatus: " + status.substring(status.lastIndexOf(":") + 1));
                                }
                        }
                }
                // the routine of exception routine.
                catch (IOException e) {
                        e.printStackTrace();
                }
               
                if(fileStatus.trim().toLowerCase().equals("ok")){
                        return  "OK";
                }else{
                        return fileStatus.trim().toLowerCase();
                }
        }