Sample Java Codes for Interface

Comparable interface Java Example Codes

import java.util.*;

/**

* This program demonstrates the use of the Comparable interface.

*/

public class EmployeeSortTest

{

public static void main(String[] args)

{

Employee[] staff = new Employee[3];

staff[0] = new Employee("Harry Hacker", 35000);

staff[1] = new Employee("Carl Cracker", 75000);

staff[2] = new Employee("Tony Tester", 38000);

Arrays.sort(staff);

// print out information about all Employee objects

for (Employee e : staff)

System.out.println("name=" + e.getName() + ",salary=" + e.getSalary());

}

}

class Employee implements Comparable

{

public Employee(String n, double s)

{

name = n;

salary = s;

}

public String getName()

{

return name;

}

public double getSalary()

{

return salary;

}

public void raiseSalary(double byPercent)

{

double raise = salary * byPercent / 100;

salary += raise;

}

/**

* Compares employees by salary

* @param other another Employee object

* @return a negative value if this employee has a lower salary than

* otherObject, 0 if the salaries are the same, a positive value otherwise

*/

public int compareTo(Employee other)

{

if (salary <>

if (salary > other.salary) return 1;

return 0;

}

private String name;

private double salary;

}

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