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Tip of the Day
Language: Java
Expertise: Beginner
Aug 19, 2002

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Append an Exception Trace to a Log File


If you want all exceptions to go to the same file, use this code:
 
import java.io.*;
import java.util.Date;

public class Logger
{
public static synchronized logException(Exception ex)
{
try {
RandomAccessFile ff = new RandomAccessFile("c:\\name.log","rw");
// to append - move file pointer
ff.seek(ff.length());
PrintWriter logWriter = new PrintWriter(new FileWriter(ff.getFD()));
logWriter.println("============="+  (new Date()).toString() +
ex.getMessage() + "========");
ex.printStackTrace(logWriter);
logWriter.println("=============================================");
logWriter.close();
}catch(Exception ee)
{//nothing to do}
}
}

Use it as following:
try{
...
}catch(Exception ex)
{ Logger.logException(ex); }
Elena Neroslavskaya
 
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