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Jprogress bar

91mustang
91mustang asked
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Last Modified: 2008-02-01
I have a Jprogress bar...I am trying to learn how to use it... this is the method i created to play around with it:

public void test() {
        importProgress.setMaximum(200000);
        for(int x=0;x<200000;x++){
            System.out.println(x);
            importProgress.setValue(x);
            importProgress.setStringPainted(true);
           
        }
    }

When I call the method, the loop does its proccessing, but the progress bar does not update until the loop is done. I want it to update in real time.. I assume i  need a listener for it. if this true what would the listener look like
thanks in advance
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Top Expert 2006

Commented:
you need a separate thread:

  public void test() {
   
    Thread progressThread = new Thread() {
      public void run() {
        importProgress.setMaximum(200000);
        for(int x=0;x<200000;x++){
          System.out.println(x);
          importProgress.setValue(x);
          importProgress.setStringPainted(true);
        }
      }
    };
    progressThread.start();
   
  }
Top Expert 2006

Commented:
setStringPainted(true) can be called outside the loop.
and you can use the sleep() inside your loop:

  public void test() {
    Thread progressThread = new Thread() {
      public void run() {
        importProgress.setMaximum(100);
        importProgress.setStringPainted(true);
        for(int x=0;x<=100;x++){
          System.out.println(x);
          importProgress.setValue(x);
          importProgress.repaint();
          try { sleep(100); }
          catch (Exception e) { ; }
        }
      }
    };
    progressThread.start();
  }

Author

Commented:
Perfect  GrandSchtroumpf, thank you

quick question, this method is going to used i a app that is importing text file to database, usually between 4-5 mill recs per text file(not alot of proccessing per line, but lots of lines.) how much resources will that new thread chew?, and i'm geussing that sleep(100) is pausing the thread for 100 milliseconds. If so what do you think would a reasonabnle sleep time for that thread

thank you again
Top Expert 2006

Commented:
i included the thread.sleep() just for the example.
you need to replace that with your import.

      public void run() {
        int numberOfRecords = 1000; // replace that with the actual number
        importProgress.setMaximum(numberOfRecords-1);
        importProgress.setStringPainted(true);
        for(int x=0;x<numberOfRecords;x++){
          importRecord(x);
          importProgress.setValue(x);
        }
      }

Author

Commented:
GrandSchtroumpf
Sorry for my ignorance.

when i use:

 public void test() {
        Thread progressThread = new Thread() {
            public void run() {
                importProgress.setMaximum(intLineCount-1);
                importProgress.setStringPainted(true);
                for(int x=0;x<=intLineCount;x++){
                   
                    importProgress.setValue(currentLineCount);
                    importProgress.repaint();
                   
                   
                }
            }
        };
        progressThread.start();
    }

the progress bar does nothing until the proccessing is done- and then shows 0% done.

currentLineCount is getting increased in a file read loop(every line)

what am i doing wrong?

Author

Commented:
>>the progress bar does nothing until the proccessing is >>done- and then shows 0% done.

sorry, actually it says 100% but does not show any values in between 0 and 100
Top Expert 2006
Commented:
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Author

Commented:
thanks again
Top Expert 2006

Commented:
you're welcome mustang
:°)
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