Java code

import java.io.*;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;


public class testing{
    String command;
    BufferedReader reader;
    String url;
    String source;
    boolean writtensrc;
    boolean writtenpage;
    PrintWriter writer;
    PrintWriter printer;
    String str;
    String page;

    public void searchCore()throws IOException{
        Java help=new Java();
        reader=new BufferedReader(new InputStreamReader(System.in));
        writer=new PrintWriter("C:\\Users\\Jakub\\Desktop\\Source.txt");
        printer=new PrintWriter("C:\\Users\\Jakub\\Desktop\\Text.txt");

        System.out.print("Choose name of website to be tested: ");
        url=reader.readLine();
        Document doc=Jsoup.connect(url).get();
        System.out.println("Connected.");

    do{
        System.out.print(">");
        command=reader.readLine();
//SIMPLE//
        if(command.equals("?getnode"))
            System.out.println(doc.nodeName());

        if(command.equals("?getname"))
            System.out.println(doc.title());

        if(command.equals("?gettag"))
            System.out.println(doc.tag());

        if(command.equals("?commands"))
            help.commands();

        if(writtensrc==true&&command.equals("?printsource"))
            System.out.println(source);

        if(writtenpage==true&&command.equals("?printpage"))
            System.out.println(page);
//MAIN//
        if(command.equals("?getsource")){
            source=doc.html();
            writer.write(source);
            writer.close();
            writtensrc=true;
            System.out.println("Done.");
        }

        if(command.equals("?getpage")){
            page=doc.text();
            printer.write(page);
            printer.close();
            writtenpage=true;
            System.out.println("Done.");
        }

        if(command.equals("?isvulnerable")){
            if(url.contains("id")||url.contains("ID")){

            Document vuln=Jsoup.connect(url+"'").get();
            String message=vuln.text();

            if(message.contains("sql")||message.contains("Sql")||message.contains("SQL"))
                System.out.println("Website is SQLi vulnerable.");
            else
                System.out.println("No vulnerable place found.");
            }
            else
                System.out.println("No parameter provided.");
        }

        if(command.equals("?getall")){
            System.out.println("Node: "+doc.nodeName());
            System.out.println("Name: "+doc.title());
            System.out.println("Tag: "+doc.tag());
        }
//STR FILTER//
        if(writtensrc==true&&command.equals("?getsourcestr")){
            str=reader.readLine();
            if(source.contains(str)){
                System.out.println("Source code contains *"+str+"*.");
            }
            else
                System.out.println("Source code does not contain *"+str+"*.");
            }
        else if(writtensrc!=true&&(command.equals("?getsourcestr")||command.equals("?printsource")))
            System.out.println("Source not found.");



        if(writtenpage==true&&command.equals("?getpagestr")){
            str=reader.readLine();
            if(page.contains(str)){
                System.out.println("Page text contains *"+str+"*.");
            }
            else
                System.out.println("Page text does not contain *"+str+"*.");
            }
        else if(writtenpage!=true&&(command.equals("?getpagestr")||command.equals("?printpage")))
            System.out.println("Text not found.");

    }while(command!="quit");
}
        public static void main(String args[])throws IOException{
            testing x=new testing();
            x.searchCore();
        }
}