Redirect my output to textarea

Question

I am doing data analysis using hadoop using java on eclipse ,I am get my output log as shown in the below image on eclipse, how can we redirect it to a text area..

Screen shot

take a look here http://stackoverflow.com/questions/2851234/system-out-to-a-file-in-java — Luca Davanzo, Feb 10 '14 at 15:32

score 0 · Answer 1 · answered Feb 10 '14 at 15:31

Try this:

public class JTextAreaOutputStream extends OutputStream {

private JTextArea destination;

public JTextAreaOutputStream(JTextArea destination) {
    if (destination == null)
        throw new IllegalArgumentException ("Destination is null");

    this.destination = destination;
}

@Override
public void write(int b) throws IOException {
    write (new byte [] {(byte)b}, 0, 1);
}

@Override
public void write(byte[] buffer, int offset, int length) throws IOException
{
    final String text = new String (buffer, offset, length);
    SwingUtilities.invokeLater(new Runnable ()
        {
            @Override
            public void run() 
            {
                destination.append (text);
            }
        });
}
}

Then Redirect you text area like this:

public void setSystemOutRedirect() {
    JTextAreaOutputStream out = new JTextAreaOutputStream (textAreaUpgraderLog);
    System.setOut (new PrintStream(out));
    System.setErr(new PrintStream(out));
}

I am not giving the output they are generated automatically, so it doesnt help — vakul, Feb 10 '14 at 15:40
its only printing the data i.e given by me in system.out.print() i want the log file to be printed.. — vakul, Feb 10 '14 at 15:58

score 0 · Answer 2 · answered Feb 14 '14 at 07:40

Just use the following snippet at the beginning of your program.

File file = new File("D:/out.txt");
        FileOutputStream fos = new FileOutputStream(file);
        PrintStream ps = new PrintStream(fos);
        System.setErr(ps);

then all Standard err will be redirected to D:/out.txt file. For redirecting standard output just use System.setOut(ps)

score 0 · Accepted Answer · edited May 23 '17 at 12:29

0

These are mostly counters and progress so, have a look at this post and JobClient's API.

Also, I think you will find this post very useful.

edited May 23 '17 at 12:29

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answered Feb 14 '14 at 12:50

vefthym

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Redirect my output to textarea

3 Answers3