Use Logger with simple formatter and FileHander : Log Handler « Log « Java Tutorial






  1. Java Tutorial
  2. Log
  3. Log Handler
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;

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

    fh = new FileHandler("c:\\MyLogFile.log", true);
    logger.addHandler(fh);
    logger.setLevel(Level.ALL);
    SimpleFormatter formatter = new SimpleFormatter();
    fh.setFormatter(formatter);

    logger.log(Level.WARNING, "My first log");
  }
}








35.5.Log Handler
35.5.1.Use ConsoleHandler
35.5.2.Using FileHandler to log a message
35.5.3.Add Multiple Handlers to a logger
35.5.4.How to write custom handler
35.5.5.Stream Handler
35.5.6.Memory Handler Demo
35.5.7.Socket Handler Demo
35.5.8.Using Regular Expressions based on StreamHandler
35.5.9.Writing Log Records to a Log File
35.5.10.A file handler that appends.
35.5.11.Writing Log Records to Standard Error
35.5.12.Writing Log Records Only After a Condition Occurs
35.5.13.Create a memory handler with a memory of 100 records and dumps the records into the file my.log
35.5.14.Flush File Handler and Logger
35.5.15.The Patterns in FileHandler
35.5.16.Limiting the Size of a Log File
35.5.17.Limiting the Size of a Log by Using a Rotating Sequence of Files
35.5.18.Use Logger with simple formatter and FileHander
35.5.19.Alternate XML by using FileHandler
35.5.20.Window Handler: display log message in a window(JFrame)