help in java program

[shivi4]

i wrote a program in java

it is complilng ok,but it is giving error runtime in dos prompt

H:\shivi>java Pg2
Exception in thread "main" java.lang.NoClassDefFoundError: Pg2


this is the program
public class Pg2
{
public static void main(String[] args)
{
int m=1,i;
while(m<=5)
{
i=1;
while(i<=m)
{
System.out.print(" "+i);
i++;

}
System.out.println("");
m++;
}

}
}

but when in run the program in idelike dr java it is not giving any error

[QwertyManiac]

Well, this happens to me also sometimes but not after i change something in the code.
try removing the public b'fore the class coz u dont need it in this program (not really necessary).

Also if the problem persists plz try to do a re-install of the SDK.

It happens rarely to me but i dont know what the problem exactly is coz the code is ok.

Even for me in Eclipse i get no errors.

[aadipa]

1. Check your CLASSPATH environmental variable. You must set it to current directory. Try this command

SET CLASSPATH=.;%CLASSPATH%

2. I feel stupid to ask this, but did u first compiled the program using javac ?

[shivi4]

thank you it worked by giving class path