Question

i have two java classes in a package. I want to create one class’s object into another but it gives an error message ERROR: cannot find symbol.

package pckg;
public class aa{
   private String name;
   public aa(){} //Constructor of aa class
   public void setName(String name){this.name=name;}
   public String getName(){return name;}
}

package pckg;
public class bb{
   aa obj = new aa(); //This line gives error message

   public bb(){} //Constructor of bb class

} 

both classes are in a same folder pckg.

ERROR Message:

D:\Java\mypack>cd..

D:\Java>cd pckg

D:\Java\pckg>set path=d:\java\jdk1.5\bin

D:\Java\pckg>javac aa.java

D:\Java\pckg>javac bb.java
bb.java:3: cannot find symbol
symbol  : class aa
location: class pckg.bb
aa obj = new aa(); //This line gives error message
^
bb.java:3: cannot find symbol
symbol  : class aa 
location: class pckg.bb
aa obj = new aa(); //This line gives error message
            ^
2 errors

Answer 1

D:\Java\ > javac -classpath . pckg\aa.java
D:\Java\ > javac -classpath . pckg\bb.java

If you don’t specify a classpath, javac doesn’t know where to find the already compiled classes.

Also, classes should start with an upper-case letter in Java. And I would avoid using the same directory for the source files and class files. You’d better put your sources inside d:\Java\src and your classes inside D:\Java classes. Then, use the following command to compile everything at once:

D:\Java\ >javac -cp classes -d classes src\pckg\*.java