View difference between Paste ID: EifXyMMy and f9xdLYxH

 interface Salary {
-	private int salary;
+  public double getValue() { ... }
 }
-	public int getSalary(){
+
-		if salary == 0 //lazy load
+	private Salary salary;
-			calculateSalary();
+
-
+	public Salary getSalary(){
 		if(!salary.isLoaded())
 			salary = new LazySalary(this);
 		return salary
-	public void calculateSalary(){
+
-		...
+
     private class LazySalary implements Salary {
       public double getValue() {
          Employee.this.calculateSalary();
          return Employee.this.getSalary().getValue();
       }
     }
 
     public class ConcreteSalary implements Salary {
       ...
     }
 
 	private void calculateSalary(){
 		... // calcula mesmo o valor
         salary = new ConcreteSalary(value);
 	}
 }