// Win95 (?)
   javac -J-Djavac.pipe.output=true myClass.java >output.txt
// WinNT (or better)
   javac  MyClass.java 2>output.txt

// WinNT (or better)
javac MyClass.java 2>&1 | MORE

//  [JDK 1.1]
//  to compile:  java JC mySource.java
//       (use redirection to keep the output)
//               java JC mySource.java >output.txt

import java.io.*;
public class JC {
  public static void main( String args[] )
     throws IOException, InterruptedException {
    String fn = "JC.java";
    if( args.length > 0 ) fn = args[0];
    System.out.println( "BEGIN (" + fn + ")" );
    Process p = 
        Runtime.getRuntime().exec( "javac -verbose " + fn );
    String buf;
    BufferedReader se = new BufferedReader
        ( new InputStreamReader( p.getErrorStream() ) );
    while( (buf = se.readLine()) != null ) 
       System.out.println( " : " + buf );
    System.out.println( "END (rc:" + p.waitFor() + ")" );
    }
}