Sharing Mutable References

• References to immutable objects can be freely shared
• Don't share mutable references
• Example
  

  class Employee
  {
     . . .
     public String getName() { return name; }
     public double getSalary() { return salary; }
     public Date getHireDate() { return hireDate; }
     private String name;
     private double salary;
     private Date hireDate;
  }