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Thinking in Java
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LogRecords

A LogRecord is an example of a Messenger object,[99] whose job is simply to carry information from one place to another. All the methods in the LogRecord are getters and setters. Here’s an example that dumps all the information stored in a LogRecord using the getter methods:

//: c15:PrintableLogRecord.java
// Override LogRecord toString()
import com.bruceeckel.simpletest.*;
import java.util.ResourceBundle;
import java.util.logging.*;

public class PrintableLogRecord extends LogRecord {
  private static Test monitor = new Test();
  public PrintableLogRecord(Level level, String str) {
    super(level, str);
  }
  public String toString() {
    String result = "Level<" + getLevel() + ">\n"
      + "LoggerName<" + getLoggerName() + ">\n"
      + "Message<" + getMessage() + ">\n"
      + "CurrentMillis<" + getMillis() + ">\n"
      + "Params";
    Object[] objParams = getParameters();
    if(objParams == null)
      result += "<null>\n";
    else
      for(int i = 0; i < objParams.length; i++)
        result += "  Param # <" + i + " value " +
          objParams[i].toString() + ">\n";
    result += "ResourceBundle<" + getResourceBundle()
      + ">\nResourceBundleName<" + getResourceBundleName()
      + ">\nSequenceNumber<" + getSequenceNumber()
      + ">\nSourceClassName<" + getSourceClassName()
      + ">\nSourceMethodName<" + getSourceMethodName()
      + ">\nThread Id<" + getThreadID()
      + ">\nThrown<" + getThrown() + ">";
    return result;
  }
  public static void main(String[] args) {
    PrintableLogRecord logRecord = new PrintableLogRecord(
      Level.FINEST, "Simple Log Record");
    System.out.println(logRecord);
    monitor.expect(new String[] {
      "Level<FINEST>",
      "LoggerName<null>",
      "Message<Simple Log Record>",
      "%% CurrentMillis<.+>",
      "Params<null>",
      "ResourceBundle<null>",
      "ResourceBundleName<null>",
      "SequenceNumber<0>",
      "SourceClassName<null>",
      "SourceMethodName<null>",
      "Thread Id<10>",
      "Thrown<null>"
    });
  }
} ///:~


PrintableLogRecord is a simple extension of LogRecord that overrides toString( ) to call all the getter methods available in LogRecord.
Thinking in Java
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   Reproduced courtesy of Bruce Eckel, MindView, Inc. Design by Interspire