How to write custom handler : Log Handler « Log « Java Tutorial

1. Java Tutorial
2. Log
3. Log Handler

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Handler;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

public class MainClass {

  private static Logger logger = Logger.getLogger("CustomHandler");

  private static List strHolder = new ArrayList();

  public static void main(String[] args) {
    logger.addHandler(new Handler() {
      public void publish(LogRecord logRecord) {
        strHolder.add(logRecord.getLevel() + ":");
        strHolder.add(logRecord.getSourceClassName() + ":");
        strHolder.add(logRecord.getSourceMethodName() + ":");
        strHolder.add("<" + logRecord.getMessage() + ">");
        strHolder.add("\n");
      }

      public void flush() {
      }

      public void close() {
      }
    });
    logger.warning("Logging Warning");
    logger.info("Logging Info");
    System.out.print(strHolder);
  }
}