Java

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• cloning Java objects
• creating a proxy objects
• speeding up EJB lookups
• ZIP compressing in Java
• writing a JUnit testcase
• serializing Java objects
• using Java logger
• looking up hostnames by IP in Java
• implementing a Queue in Java
• parsing XML files (DOM)
• reading files in java

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How to use Logger in Java

This example shows how to use Java's Logger.

import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;
import java.io.IOException;

class LoggerTest {
    public static void main(String[] args) {
        Logger logger = Logger.getLogger("MyLog");
        FileHandler fh;

        try {
            fh = new FileHandler("c:\\log\\mylog.log", true);
            logger.addHandler(fh);
            logger.setLevel(Level.ALL);
            SimpleFormatter formatter = new SimpleFormatter();
            fh.setFormatter(formatter);
            logger.log(Level.WARNING, "My first line in the log.");
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}