Question

i have two programs
one in directory /home/redhat/Documents/java1/j1

Demo1.java

package j1;
public class Demo1
{
        public void print()
        {
                System.out.println("hi");
        }
}

and the other in directory /home/redhat/Documents/java1/j

Demo2.java

import j1.*;
public class Demo2
{
        Demo2()
        {
                Demo1 d=new Demo1();
        }
}

when i say

javac -classpath /home/redhat/Documents/java1/j1 Demo2.java

i get the following error

Demo2.java:2: package j1 does not exist
import j1.*;
^
Demo2.java:7: cannot access Demo1
bad class file: /home/redhat/Documents/java1/j1/Demo1.java
file does not contain class Demo1
Please remove or make sure it appears in the correct subdirectory of the classpath.
                Demo1 d=new Demo1();
                ^
2 errors

i want to access instance of Demo1 in Demo2
please help.

Answer 1

Your classpath is wrong. You should point to the root of any declared packages:

javac -classpath /home/redhat/Documents/java1 Demo2.java

Other previous step that I miss is the compilation of Demo1 class. Javac compiler will look for “.class” files, not “.java” ones. So before executing that you need:

javac Demo1.java

As an improvement I would suggest you that you declare your second class inside package “j” instead of default package, since it is not a good idea to have root source paths inside another root path that already contains packages.