How do I change java logging console output from std err to std out?

Question

I\'m using the standard ConsoleHandler from java.util.logging and by default the console output is directed to the error stream (i.e. System.

Answer 1

I had a similar problem. I wanted to log INFO and below to System.out, and WARNING and above to System.err. Here is the solution I implemented:

public class DualConsoleHandler extends StreamHandler {

    private final ConsoleHandler stderrHandler = new ConsoleHandler();

    public DualConsoleHandler() {
        super(System.out, new SimpleFormatter());
    }

    @Override
    public void publish(LogRecord record) {
        if (record.getLevel().intValue() <= Level.INFO.intValue()) {
            super.publish(record);
            super.flush();
        } else {
            stderrHandler.publish(record);
            stderrHandler.flush();
        }
    }
}

Of course, you could make it more flexible by factoring out the hard-coded reference to Level.INFO, for example. But this worked well for me to get some basic dual-stream logging. (BTW, the tips about not subclassing ConsoleHandler to avoid closing the System.err were very useful.)