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Java语言中的对象和类/EmployeeTest.java

+import java.util.Date;
+import java.util.GregorianCalendar;
+
+/**
+ * <strong> 2023-01-13 </strong> <br>
+ * This program tests the Employee class.
+ *
+ * @author Cay Horstmann
+ * @version 1.11 2004-02-19
+ */
+
+public class EmployeeTest {
+    public static void main(String[] args) {
+        // fill the staff array with three Employee objects
+        Employee[] staff = new Employee[3];
+
+        staff[0] = new Employee("Carl Cracker", 75000, 1987, 12, 15);
+        staff[1] = new Employee("Harry Hacker", 50000, 1989, 10, 1);
+        staff[2] = new Employee("Tony Tester", 40000, 1990, 3, 15);
+
+        // raise everyone's salary by 5%
+        for (Employee e : staff)
+            e.raiseSalary(5);
+
+        // print out information about all Employee objects
+        for (Employee e : staff)
+            System.out.println("name=" + e.getName() + ",salary=" + e.getSalary() + ",hireDay="
+                    + e.getHireDay());
+    }
+}
+
+class Employee {
+    private String name;
+    private double salary;
+    private Date hireDay;
+
+    public Employee(String n, double s, int year, int month, int day) {
+        name = n;
+        salary = s;
+        GregorianCalendar calendar = new GregorianCalendar(year, month - 1, day);
+        // GregorianCalendar uses 0 for January
+        hireDay = calendar.getTime();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public double getSalary() {
+        return salary;
+    }
+
+    public Date getHireDay() {
+        return hireDay;
+    }
+
+    public void raiseSalary(double byPercent) {
+        double raise = salary * byPercent / 100;
+        salary += raise;
+    }
+}