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Exception in thread, java code wont execute properly. If/else statments


Exception in thread, java code wont execute properly. If/else statments

By : joykwame
Date : November 24 2020, 04:01 AM
wish help you to fix your issue y is double so use Double.parseDouble: (same as anwser)
code :
y = Double.parseDouble(anwserString);
new Double(d1).compareTo(new Double(d2))
 anwserString = JOptionPane.showInputDialog(null,"Enter your Admission Test Score", "Test Score", JOptionPane.QUESTION_MESSAGE);


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Can Invoke execute main UI thread code that throws exception?

Can Invoke execute main UI thread code that throws exception?


By : user1757161
Date : March 29 2020, 07:55 AM
Hope that helps I think that rather than using an event to setup and continue the loop, I would create an asynchronous delegate with a callback method. When the process is complete you simply call back to the RunCopyScript(...) again. Take a look at delegates on MSDN, and asynchronous programming. I'm sure someone will have a way of doing this with Action, I just don't know it well enough to give you an example.
I also saw a neat snippet on how to get the output into a gui control element from a cross-threaded function. Unfortunately, I cannot find the elegant piece of coding that I saw earlier...if I do run across it, I'll post a link to it.
code :
// same signature as the method to be called asynchronously
delegate void RunScript(Int32 scriptIdx);

// declare IAsyncResult
IAsyncResult result;

Process proc = null;

private void copybutton_Click(object sender , EventArgs e)
{
    InitializeBar();

    nbr_of_copy_exits_ = 0;
    //this.RunCopyScript(this.nbr_of_copy_exits_);
    RunScript start = new RunScript(RunCopyScript);

    result = start.BeginInvoke(nbr_of_copy_exits_ , new AsyncCallback(CopyExited) , proc);
    copybutton.Enabled = false  // you don't want the button to be clicked again.
}

private void RunCopyScript(Int32 CopyScriptIdx)
{
    try
    {
        proc = ObtainProcess(client_dest_dir_ + copy_scripts_[CopyScriptIdx]);
        proc.EnableRaisingEvents = true;
        //proc.Exited += new EventHandler(CopyExited);
        proc.Start();
        progressBar.Value = ProgressInPercent(copy_scripts_.Count() , CopyScriptIdx);
    }
    catch (Exception ex)
    {
        UpdateControl(this.toolStripStatusLabel1, "Error involving " + copy_scripts_[CopyScriptIdx] + ": " + 
            ex.Message);
        copybutton.BackColor = Color.Red;
    }
    //return;
}

void CopyExited(IAsyncResult iaRes)
{
    AsyncResult result = (AsyncResult)iaRes;
    RunScript caller = (RunScript)result.AsyncDelegate;

    Process senderProcess = (Process)iaRes.AsyncState;
    caller.EndInvoke(iaRes);

    if (++this.nbr_of_copy_exits_ == this.copy_scripts_.Count())
    {
        UpdateControl(toolStripStatusLabel1 , "Copying COMPLETE.");
        copybutton.Enabled = true;   // enable the button now that we're done
    }
    else
    {
        // start the process all over again
        iaRes = caller.BeginInvoke(this.nbr_of_copy_exits_ , new AsyncCallback(CopyExited) , proc);
    }
}

private void UpdateControl(ToolStripStatusLabel tssl , String text)
{
    Invoke((MethodInvoker)delegate
    {
        tssl.Text = text;
        progressBar.Value = 0;
    });

    //tssl.Refresh();  'System.Windows.Forms.ToolStripStatusLabel' does not contain a definition for 'Refresh'...
}
Creating a JAVA database from code. Statement wont execute and create table?

Creating a JAVA database from code. Statement wont execute and create table?


By : user6205687
Date : March 29 2020, 07:55 AM
Any of those help Depending on the IDE you are using you could manually create the table in a console without going through the trouble of writing it in code. Here are some examples of how you could get the information from the tables.
code :
Connection conn = CreatingDerbyDJB.dbConnection();

            try{
                String query = "INSERT INTO  Items (Name,Color,ItemName,SchoolName, Description) VALUES(?,?,?,?, ?)";
                PreparedStatement pstmt = conn.prepareStatement(query);


                pstmt.execute();
                conn.close();
              }catch(Exception e)
            {
                  e.printStackTrace();
            }       }
import java.sql.Connection;
import java.sql.DriverManager;

import javax.swing.JOptionPane;

public class CreatingDerbyDJB 
{
    public static final String DRIVER = "org.apache.derby.jdbc.EmbeddedDriver";
    public static final String JDBC_URL  = "jdbc:derby:LostAndFoundDB";
    public static Connection dbConnection()
    {
        try
        {
            Class.forName(DRIVER).newInstance();
            Connection c = DriverManager.getConnection(JDBC_URL);
            return c;
        }catch(Exception e)
        {
            JOptionPane.showMessageDialog(null, e);
            return null;
        }
    }
}
cocoa app exit code wont execute even if i had sleep thread

cocoa app exit code wont execute even if i had sleep thread


By : Ovidiu Patru
Date : March 29 2020, 07:55 AM
With these it helps That's the wrong delegate method, use applicationWillTerminate.
And never use setValue(_:forKey to save something to UserDefaults. Use always the generic set(_:forKey
code :
func applicationWillTerminate(_ aNotification: Notification)
{
    UserDefaults.standard.set("prefs1", forKey: "preferences")
}
java wont let me increment these arrays by 2. keep getting an error that their not statments

java wont let me increment these arrays by 2. keep getting an error that their not statments


By : Travis
Date : March 29 2020, 07:55 AM
will be helpful for those in need , It should be i += 2 in the the for loop
Can anyone help identify why this wont execute properly? IF promblems with cast

Can anyone help identify why this wont execute properly? IF promblems with cast


By : Shishir
Date : March 29 2020, 07:55 AM
will help you A couple of things are wrong.
In your if(q_mos = char(Y)) statement,
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