Re: Way to capture System.out in a *sandboxed* app.?

Christian <>
Thu, 01 Nov 2007 18:17:35 +0100
Andrew Thompson schrieb:

System.out/err cannot be redirected in a sandboxed**

Assuming you wanted to to show the end user the
System.out/System.err from a *sandboxed* app.*, how
would you go about collecting the information?

* Note - I am looking at launching apps. written by other
people, so I need to intercept/duplicate the normal
System.out/err they might use. The GUI might be
invoked by a 'full trust' app. - then the task is easy,
*but otherwise,* is there a (sandboxed) way to intercept
those streams?

**This (sandboxed) Applet is not allowed to set the
output stream..

import java.applet.Applet;
import java.awt.Label;

public class RedirectOutputInApplet extends Applet {

  public void init() {
    try {
      PrintStream ps = new PrintStream(
        new ByteArrayOutputStream());
    } catch(Throwable t) {
      add(new Label(t.getMessage()) );

may be it would do if you run some program in a childprocess you could
redirect the output stream to your likings:

see Process and ProcessBuilder classes

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