asked on

issue in java program

What is the issue in this program?

class MainClass
{
   public static void main(String aa[])
   {
      string ABC = "Test";
	  ABC = "test123";
	  System.out.println(ABC);
   }
}

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Bill Bach

Should be "String", not "string"?

KaranGupta

ASKER

Still I am getting the same error

class MainClass
{
   public static void main(String aa[])
   {
      String ABC = "Test";
	  ABC = "test123";
	  System.out.println(ABC);
   }
}

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Ken Butters

Specify your error.

Bill Bach

Try this one:

public class MainClass
{
   public static void main(String[] aa)
   {
      String ABC = "Test";
	  ABC = "test123";
	  System.out.println(ABC);
   }
}

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Can you at least post the result you are getting?

KaranGupta

ASKER

C:\Program Files\Java\jdk1.7.0_07\bin>javac D:\Karan_work\JavaP\MainClass.Java
javac: invalid flag: D:\Karan_work\JavaP\MainClass.Java
Usage: javac <options> <source files>
use -help for a list of possible options

Ken Butters

Try putting path in double quotes:

javac "D:\Karan_work\JavaP\MainClass.Java"

Tomas Helgi Johannsson

Hi!

Make sure you have CLASSPATH pointing to the correct java class library
in the windows environment (ENV).

Regards,
Tomas Helgi

ASKER CERTIFIED SOLUTION

CEHJ

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Pramod Kumar

First, the way you are compiling, no need to set the PATH variable as "javac" is found and you are getting java compiler generated error and not the 'invalid javac command'. But for easy work it is a good idea to have PATH variable set for the java install location.

Second, The javac expect a java file/path without a space. As per your post I do not see a space in the file path. Be sure that you do not have any space in the file path. But to be in safe side keep the whole path enclosed in double quotes as below:
(As buttersk (ID: 38418717))
Compile
C:\Program Files\Java\jdk1.7.0_07\bin>javac "D:\Karan_work\JavaP\MainClass.Java"

Run
C:\Program Files\Java\jdk1.7.0_07\bin>java -cp "D:\Karan_work\JavaP" MainClass

Again, the above solution is solving the issue in your way which is not standard and actually not suggested

CEHJ

First, the way you are compiling, no need to set the PATH variable as "javac" is found

It would be found ;) - buttersk is working in the bin directory, which s/he shouldn't be doing

Pramod Kumar

@CEHJ,

Yes, thats why at the end i wrote:

Again, the above solution is solving the issue in your way which is not standard and actually not suggested

and

But for easy work it is a good idea to have PATH variable set for the java install location.