Java by API/java.util.logging/Filter

implements Filter

   <source lang="java">
 

import java.util.logging.Filter; import java.util.logging.Level; import java.util.logging.LogRecord; import java.util.logging.Logger; public class Main {

 private static Logger logger = Logger.getLogger("SimpleFilter");
 static class A {
 };
 static class B {
 };
 static void sendLogMessages() {
   logger.log(Level.WARNING, "message 1!", new A());
   logger.log(Level.WARNING, "message 2!", new B());
 }
 public static void main(String[] args) {
   sendLogMessages();
   logger.setFilter(new Filter() {
     public boolean isLoggable(LogRecord record) {
       Object[] params = record.getParameters();
       if (params == null)
         return true;
       if (record.getParameters()[0] instanceof A)
         return true;
       return false;
     }
   });
   logger.info("After setting filter..");
   sendLogMessages();
 }

}

 </source>