jar file

[wang shao]

Hi,
if I have three java classes like:
(1)
package com.1
import com.2
import com.3
class c1{....}
(2)
package com.2
import com.1
import com.3
class c2{....}
(3)
package com.3
import com.1
import com.2
class c3{....}
my problem is that how I can compile them and jar them and use them?
Thanks in advance