Question

i have some java files included in package com.das.dbmodule. when i run these java files using netbeans or eclipse they works well. But i get some errors when i try to run them using command prompt. i tried it using default package but same problem. i have put all java files in jdk bin folder. i am using mysql data base and mysql connector jar file.
i get errors like

C:\Program Files\Java\jdk1.6.0\bin>cd..

C:\Program Files\Java\jdk1.6.0>cd..

C:\Program Files\Java>cd program files
The system cannot find the path specified.

C:\Program Files\Java>cd java
The system cannot find the path specified.

C:\Program Files\Java>cd jdk1.6.0

C:\Program Files\Java\jdk1.6.0>cd bin

C:\Program Files\Java\jdk1.6.0\bin>javac fileoperation.java
fileoperation.java:47: cannot find symbol
symbol  : class Dbconnection
location: class fileoperation
        Dbconnection dbconnection   = new Dbconnection();
        ^
fileoperation.java:47: cannot find symbol
symbol  : class Dbconnection
location: class fileoperation
        Dbconnection dbconnection   = new Dbconnection();
                                          ^
fileoperation.java:48: cannot find symbol
symbol  : class Filefinder1
location: class fileoperation
        Filefinder1  f              = new Filefinder1();    // call constructor
        ^
fileoperation.java:48: cannot find symbol
symbol  : class Filefinder1
location: class fileoperation
        Filefinder1  f              = new Filefinder1();    // call constructor
                                          ^
4 errors

C:\Program Files\Java\jdk1.6.0\bin>java fileoperation
Exception in thread "main" java.lang.NoClassDefFoundError: fileoperation

C:\Program Files\Java\jdk1.6.0\bin>Pause
Press any key to continue . . .

basically i am trying to create a batch file that will update my server after every 5 min. i am a student developing an web app. please guide me. i have my project demo day after tomorrow.

Answer 1

It would appear that some batchfile is screwing up, in particular with

C:\Program Files\Java>cd program files

That should most likely be

C:\Program Files\Java>cd "program files"

where the " quotes force the Windows cmd.exe shell to treat the whole quoted phrase as a single directory. Without the quotes, it’s attempting to cd into a directory named program, with an unknown second argument named files. With the quotes, it’s looking for a directory named program files.