How to write custom Log handler : Log « Language Basics « Java

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Java » Language Basics » Log Screenshots  How to write custom Log handler    // : c15:CustomHandler.java //How to write custom handler //From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002 //www.BruceEckel.com. See copyright notice in CopyRight.txt. 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 CustomHandler {   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);   } } ///:~                               Related examples in the same category 1.  Log level 2.  Simple Log Formatter Example 3.  Log to file with FileHandler and SimpleFomatter 4.  Log multiple Handlers 5.  Log multiple Handlers 2 6.  Override LogRecord toString() 7.  Email Logger 8.  Log To File with FileHandler 9.  Logging Levels 10.  Creating a Custom Log Level 11.  Logging Level Manipulation 12.  Configure Logging 13.  Log Client Filter 14.  Log HTML Table Formatter 15.  Logging Example 1 16.  Basic Logging Example 17.  Java Log:Basic Logging 18.  Java log: Hierarchy logging 19.  Java log: various log methods 20.  Java log: Stream Handler Demo 21.  Java log: File Handler Demo 22.  Java log: Memory Handler Demo 23.  Java log: Socket Handler Demo 24.  Java log: Basic logging 2 25.  Java log: Logging Server 26.  Java log: log filter 27.  Java log: XML log 28.  Java log: alternate XML log 29.  Java log: Localize Logging 30.  Java log: Custom XML Formatter 31.  Java log: Remote Config Reader 32.  Java log: Log and Window(JFrame, frame) 33.  File Logger 34.  Setting the Formatter of a Logger Handler 35.  Memory Handler Demo 36.  Socket Handler Demo 37.  XMLFormatter based Logging 38.  #define the properties for the SocketHandler 39.  Custom filter 40.  Using Regular Expressions based on StreamHandler 41.  The Quintessential Logging Program 42.  Determining If a Message Will Be Logged 43.  Logging a Method Call 44.  Logging an Exception 45.  Minimizing the Impact of Logging Code 46.  Preventing a Logger from Forwarding Log Records to Its Parent 47.  Writing Log Records to a Log File 48.  A file handler that appends. 49.  Writing Log Records to Standard Error 50.  Writing Log Records Only After a Condition Occurs 51.  Create a memory handler with a memory of 100 records and dumps the records into the file my.log 52.  Setting a Filter on a Logger Handler 53.  Comparing Log Levels: To compare the severity of two logging levels, use Level.intValue(). 54.  Creating a Custom Formatter for a Logger Handler 55.  Limiting the Size of a Log File 56.  Limiting the Size of a Log by Using a Rotating Sequence of Files 57.  Configuring Logger Default Values with a Properties File 58.  Determining When the Logging Configuration Properties are Reread 59.  Handling Errors While Parsing an XML File 60.  An example of a program providing the functionality of logging 61.  Use Logger with simple formatter and FileHandler 62.  Logger with XMLFormatter and FileHandler 63.  Stream Handler 64.  The Patterns in FileHandler 65.  Flush File Handler and Logger 66.  Config Demo 67.  config.properties 68.  Alternate XML by using FileHandler 69.  Localized Logging 70.  Define your own Custom Formatter 71.  Remote ConfigReader with URLConnection 72.  Window Handler: display log message in a window(JFrame) 73.  Create log with package name 74.  Logger Demo 75.  Return a message for logging. 76.  A simple wrapper around JDK logging facilities