it-wdsa-1c / practicaljava Goto Github PK

What steps will reproduce the problem?
The page 74 (Lesson 7) has the next code snippet (section 5):

import com.practicaljava.lesson7.tryit.*;

public class TestPayIncreaseInterface {

     public static void main(String[] args) {
          Payable[] workers = new Payable[3];
          workers[0] = new Employee("John");
          workers[1] = new Contractor("Mary");
          workers[2] = new Employee("Steve");

          for(Payable p : workers) {
               ((Payable)p.)increasePay(30);
          }
     }

}
This code wouldn't compile. You can see it on the next screenshot 
http://goo.gl/SJQby

I think the code snippet may have the next form:

import com.practicaljava.lesson7.tryit.*;

public class TestPayIncreaseInterface {

     public static void main(String[] args) {
          Payable[] workers = new Payable[3];
          workers[0] = new Employee("John");
          workers[1] = new Contractor("Mary");
          workers[2] = new Employee("Steve");

          for(Payable p : workers) {
               p.increasePay(30);
          }
     }

}

Its work fine and the output (http://goo.gl/kSNQp) is the same as in section 6 
(page 74).
Maybe I'm wrong and I am kindly asking you for letting me know about this. 

written "TextTax" instead "TestTax".

Listing 8-5 (page 85)

This code wouldn't compile.

GridBagConstraints constr = new GridBagConstraints();
//setting constraints for the Calculator’s displayField:
// x coordinate in the grid
constr.x=0;
// y coordinate in the grid
constr.y=0;


http://goo.gl/VO3Nc
The class GridBagConstraints has no fields x and y.
I think it's maybe the gridx and gridy fields.