Mega Code Archive
Creating a Comparable object
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import java.util.Arrays;
import java.util.Set;
import java.util.TreeSet;
public class Person implements Comparable {
String firstName, lastName;
public Person(String f, String l) {
this.firstName = f;
this.lastName = l;
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
public String toString() {
return "[dept=" + firstName + ",name=" + lastName + "]";
}
public int compareTo(Object obj) {
Person emp = (Person) obj;
int deptComp = firstName.compareTo(emp.getFirstName());
return ((deptComp == 0) ? lastName.compareTo(emp.getLastName())
: deptComp);
}
public boolean equals(Object obj) {
if (!(obj instanceof Person)) {
return false;
}
Person emp = (Person) obj;
return firstName.equals(emp.getFirstName())
&& lastName.equals(emp.getLastName());
}
public static void main(String args[]) {
Person emps[] = { new Person("Debbie", "Degree"),
new Person("Geri", "Grade"), new Person("Ester", "Extent"),
new Person("Mary", "Measure"),
new Person("Anastasia", "Amount") };
Set set = new TreeSet(Arrays.asList(emps));
System.out.println(set);
}
}
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