How to create Cryptocurancy App using java

Hello dear steemit friends,

today i am  going to show you how to create small java application for coin market.  first you need to small things.

1.small java knowledge

2.java development kit ( JDK ) you can download

3.IDE ( i am using netbeans )

4.small brain

5.1 laptop 

6.2 hand

7.jsoup library

 ok guys, now  we are ready for do that. 

 install netbeans ide and after 

1. file >> New project >> Java >> Java application >> project name and path >> finish

fisrt you need to design this user interface using netbeans ide or another ide.

THIS IS VERY IMPORTENT :  add jsoup libry to you project. google " how to add libry to netbeans project"

![Screenshot_2.png]()

and we are going to code our application.  no no it is not complicated. too easy . 

 double click "start market button" or right click  Event >> action >> action performed

 then code like this.

    javax.swing.Timer t;

        t = new javax.swing.Timer(1000, new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                Document doc;

                try {

                    String y=a.getText();

                    // need http protocol

                    doc = Jsoup.connect("https://coinmarketcap.com/currencies/digibyte/").get();

                    Elements divTag = doc.getElementsByClass("text-gray");

                    System.out.println(divTag.text());

                    String x = divTag.text().toString();

                    String fi = "";

                    for (int i = 0; i < 11; i++) {

                        char c = x.charAt(i);

                        fi = fi + c;

                    }

                    System.out.println(fi);

                    ta.setText(fi);

                    if (ta.getText().equals(a.getText())) {

                        System.out.println("yes");

                        Toolkit.getDefaultToolkit().beep();

                    }

                } catch (java.net.UnknownHostException rt) {

                    JOptionPane.showMessageDialog(createRootPane(),"not a internet connection");

                     System.exit(0);

                } catch (IOException d) {

                }

            }

        });

        t.start();

  

      

      thats it. now you can run your java application. and click start market button its will gave values.

        ohhh its working.....

        ![Screenshot_3.png]()

     

    now i can do small explain in code. look at this line.

   " doc = Jsoup.connect("https://coinmarketcap.com/currencies/digibyte/").get();"

     you can change this link to other currancy. like this.

   " doc = Jsoup.connect("https://coinmarketcap.com/currencies/dash/").get();"

   

     i think you are enjoying this article.  i hope to another  tutorial for   crypto application.

    you can develop this application. this is too small.

    hope you learn something.

  Good Luck!