Java Not Running In My Pc

[sonidhanni]

hi!!
my problem is im not able to start java in my pc. i am installing jdk1.5 in my pc n wenever i try to run my program by command
javac example.java
the program compiles bt when i try to intrepet by
java example it shows an error [no main class found]
i m really irritated i changed mu envoirnment variables n tried to do everythng i coud. so plz help!!!!!!!!!!!!!!!!!

[TylerSBreton]

I might be mis-interpreting what your saying, but did you implement a main method in the program you are trying to run?

[sonidhanni]

yup! i did insert a main method
eg:
class tree
{
public static void main(String a[])
{
System.out.println("hi");
}
}
even this program is creatin g an error : tree
this is the problem

Exception in thread "main" java.Lang.NoclassDefFoundError:

[aniseed]

What command are you using to execute it?

Try with java -cp . tree

[sonidhanni]

hi im still not able to run my java in my pc. my java is installed in c:\program files\java\jdk1.5.0_0.6\bin. im able to compile my programs bt cannot intrepret. i hv set envoirnmental variables . bt still no help.
even my simplest code doesnot run
eg:
class rat
{
publlic static void main(String a[])
{
System.out.println("hiii");
}
}
im still getting the problems Exception in thread "main" java.Lang.NoClassDefFoundError : rat. plz help me ne1

[sonidhanni]

:sad: hi im still not able to run my java in my pc. my java is installed in c:\program files\java\jdk1.5.0_0.6\bin. im able to compile my programs bt cannot intrepret. i hv set envoirnmental variables . bt still no help.
even my simplest code doesnot run
eg:
class rat
{
publlic static void main(String a[])
{
System.out.println("hiii");
}
}
im still getting the problems Exception in thread "main" java.Lang.NoClassDefFoundError : rat. plz help me ne1
:sad: :sad:

[sonidhanni]

i did javac tree.java for compiling
n java tree for intrepreting

[sonidhanni]

dear its showin a lot of options of java bt not output

[peter_budo]

check that you have semicolom after java home directory in path variable

c:\program files\java\jdk1.5.0_0.6\bin;

I had problem with that once, on some pc's will run it whitout this semicolom , but other refuse

ps:
not

publlic static void main(String a[])

but

public static void main(String args[])

[sonidhanni]

i did tried wot u said bt still didnt worked n 1 thng public static void main (string args[]) in d place of args we can use anything coz this is an array this u cn try urslf

[jetyan]

you can try to set your envoirnmental variables in command,maybe it can help you deal with this problem!Once started I metthe same problem!
1:use "set" to check your "path" and "classpath" settings;
2:set path=c:\....\bin;
set classpath=d:\...; //-your own dir;
3 try again!

!!!when you close your command.exe they will not work,you have to do it again!

[p.bondam]

wellknown problem for us all
please leave dos and install jGrasp on your machine
than you have someone you can talk to
it's a java-shell and I use it all the time and get supported all the way from texas when I have a problem.

the address : www.jgrasp.com

good luck
peter