Problems compiling packages

Question

Hi there! I have problems when I use packages, if someone can help me i will be very thankful. This the code that I am using:
//Stack.java
package DataStructures;
import DSExceptions.*;
public interface Stack
void push( Object x);
void pop() throws Underflow;
Object top() throws Underflow;
Object topAndPop() throws Underflow;
boolean isEmpty();
void makeEmpty();
//StackAr.java
package DataStructures;
import DSExceptions.*;
public class StackAr implements Stack
* Construct the stack.
public StackAr( )
this( DEFAULT_CAPACITY );
Both files are in the same directory DataStructures, I can copile Stack.java but I can not compile StackAr.java, it has the next error:
StackAr.java:24: cannot resolve symbol
symbol : class Stack
location: class DataStructures.StackAr
public class StackAr implements Stack
^
1 error
What am I doing wrong? Thanks a lot for helping me.

Answer 1

When you give a class a package, you need to import that package.
You need to add the bolded text:
package DataStructures;
import DSExceptions.*;
import DataStructures.*;
public class StackAr implements Stack
* Construct the stack.
public StackAr( )
this( DEFAULT_CAPACITY );
Happy programming. :)