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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;
  
  }
  

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