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  2. Trying to execute file every x seconds

Trying to execute file every x seconds

由 若如初见. 提交于 2019-12-01 13:34:54

You only have one class, Learningfromscrach. Within it you have a main function. Within the main function you create another instance of Learningfromscrach which is now passed to your timer to be run every 10 seconds. When it runs in 10 seconds, it creates yet another instance of Learningfromscrach, and so on.

You don't really need to re-implement Learningfromscrach every 10 seconds. What you want is for the data to update every 10 seconds. You should be able set a timer on an update function that will run every 10 seconds. (I can't do code examples right now, but investigate this and see how far you get.)

edit: I refactored your project, eliminating the unused elements and adding some methods and a JScrollPane. Hope this helps.

import java.awt.*;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;
import javax.swing.table.*;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import java.util.Timer;
import java.util.TimerTask;
import java.awt.Toolkit;
import java.awt.BorderLayout;


public class Learningfromscrach extends JFrame 
{
    Toolkit toolkit;
    Timer timer = new Timer();
    DefaultTableModel model;
    JTable table;
    String url = "http://bmreports.com/bsp/additional/soapfunctions.php?element=SYSPRICE&dT=NRT";
    String col[] = {"SBP","SSP","Period"};
    JScrollPane scrollPane;

    public Learningfromscrach() 
    //tell java to initiate the create interface
    //this is what is passed to the timer every 10 seconds
    {
        createUserInterface();
    }

private void createUserInterface()
//all the parts to create the userinterface      
{//from here
    setLayout( new BorderLayout());
    setTitle("Cashout Prices");//setTitle is also a JAVA Parameter
    setVisible(true);    //makes the java application show


    table = CreateTable(url,col);

    scrollPane = new JScrollPane(table,
            ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
            ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
    add(scrollPane,BorderLayout.CENTER);
    pack();
    setSize(getWidth(), 200); //initial size

    setDefaultCloseOperation(EXIT_ON_CLOSE);

    int delay = 5000; //5 seconds
    int period = 5000; //5 seconds

    timer.scheduleAtFixedRate(new TimerTask() 
    {
        public void run() {
            RefreshTable(url, col);
            System.out.format("Task run..");
        }
    }, delay, period);
}     
private Object[][] GetTableInfo(String url)
{
      Document doc = null;
      try 
      {
            doc = Jsoup.connect(url).get();
      } 
      catch (IOException ex) 
      {
            Logger.getLogger(Learningfromscrach.class.getName()).log(Level.SEVERE, null, ex);
      }
      Elements Periodparagraphs;      
      Elements SSPparagraphs;
      Elements SBPparagraphs; 

      Periodparagraphs = doc.select("SP");//counts the number of SSP Paragraphs in the entire document
      SSPparagraphs = doc.select("SSP");//counts the number of SSP Paragraphs in the entire document
      SBPparagraphs = doc.select("SBP");//counts the number of SBP Paragraphs in the entire document

      String[] numbers1;
      numbers1 = Periodparagraphs.text().split(" ");

      String[] numbers;
      numbers = SSPparagraphs.text().split(" ");

      String[] numbers0;
      numbers0 = SBPparagraphs.text().split(" ");

      int tableRows;

      if (numbers0.length > numbers.length && numbers0.length > numbers1.length)
      {
          tableRows = numbers0.length;
      }
      else if (numbers.length > numbers0.length && numbers.length > numbers1.length)
      {
          tableRows = numbers.length;
      }
      else
      {
          tableRows = numbers1.length;
      }

      Object[][] data = new String[tableRows][3];//3 is number of columns

      for (int x = 0; x < tableRows; x++ )
      {
          try
          {
              data[x][0] = numbers1[x];
          }
          catch (IndexOutOfBoundsException e)
          {
              data[x][0] = "  ";//error
          }

          try
          {
              data[x][1] = numbers[x];
          }
          catch (IndexOutOfBoundsException e)
          {
              data[x][1] = "  ";
          }

          try
          {
              data[x][2] = numbers0[x];
          }
          catch (IndexOutOfBoundsException e)
          {
              data[x][2] = "  ";
          }
      }

    return data;
}

private JTable CreateTable(String url, String[] cols)
{
    JTable tempTable=new JTable(GetTableInfo(url),col)
    {
        @Override
        public boolean isCellEditable(int arg0, int arg1) 
        {
            return false;
        }   
    };

    JTableHeader header = tempTable.getTableHeader();
    header.setBackground(Color.yellow);

    tempTable.setLayout(null);
    tempTable.setVisible(true);

    return tempTable;
}

private void RefreshTable(String url, String[] cols)
{
    Object[][] info = GetTableInfo(url);
    for (int row = 0; row < info.length; row++)
    {
        for (int column = 0; column < cols.length; column++)
        {
            table.setValueAt(info[row][column],row, column);
        }
    }
}

public static void main(String[] args) throws InterruptedException 
{
    // TODO code application logic here
    // BasicConfigurator.configure();
    new Learningfromscrach();

    System.out.format("Task scheduled.. Now wait for 5 sec to see next message..%n");
}

}

标签
java
quartz-scheduler
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