loggingexceptions2.java

java编程思想(第四版)书中原代码 ,对初学者很有用的东西

//: exceptions/LoggingExceptions2.java
// Logging caught exceptions.
import java.util.logging.*;
import java.io.*;

public class LoggingExceptions2 {
  private static Logger logger =
    Logger.getLogger("LoggingExceptions2");
  static void logException(Exception e) {
    StringWriter trace = new StringWriter();
    e.printStackTrace(new PrintWriter(trace));
    logger.severe(trace.toString());
  }
  public static void main(String[] args) {
    try {
      throw new NullPointerException();
    } catch(NullPointerException e) {
      logException(e);
    }
  }
} /* Output: (90% match)
Aug 30, 2005 4:07:54 PM LoggingExceptions2 logException
SEVERE: java.lang.NullPointerException
        at LoggingExceptions2.main(LoggingExceptions2.java:16)
*///:~