student.java

Java程序设计技巧与开发实例附书源代码。

public class Student
{  private String name;
   private double GPA;

   public Student()
   {  this("无名氏", -1.0); }
   public Student(String _name)
   {  this(_name, -1.0); }
   public Student(double _GPA)
   {  this("无名氏", _GPA); }
   public Student(String _name, double _GPA)
   {  name = _name;
      GPA  = _GPA;
   }
   public void showStudent()
   {  System.out.print("Student: " + name);
      if (GPA >= 0.0)
         System.out.println(" (GPA: " + GPA + ")");
      else
         System.out.println();
   }
}