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"

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](https://steemitimages.com/DQmcmJQsYU4sN9ZigjQRF8HDVHD1UU5wdvzZbfdgVdbswru/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!