Introduction to Objects - Advanced Topics in Java: Core Concepts in Data Structures - page 54

Note that this would return the first person it finds with the given age. We write Program P2.3 to test
this function.
Program P2.3
import java.util.*;
public class SearchTest {
public static void main(String[] args) {
// set up an array with 7 persons
Person[] person = new Person[7];
person[0] = new Person("Gary", 25, 'M');
person[1] = new Person("Inga", 21, 'F');
person[2] = new Person("Abel", 30, 'M');
person[3] = new Person("Olga", 36, 'F');
person[4] = new Person("Nora", 19, 'F');
person[5] = new Person("Mary", 27, 'F');
person[6] = new Person("Bert", 32, 'M');
Scanner in = new Scanner(System.in);
String s;
System.out.printf("Enter names, one at a time, and I'll tell you\n");
System.out.printf("their age and gender. To end, press Enter\n\n");
while (!(s = in.nextLine()).equals("")) {
int n = sequentialSearch(s, person, person.length);
if (n >= 0)
System.out.printf("%d %c\n\n", person[n].age, person[n].gender);
else System.out.printf("Not found\n\n");
}
} // end main
// search for key in the first n elements of the array person ;
// if found, return the position, else return -1
public static int sequentialSearch(String key, Person[] person, int n) {
for (int h = 0; h < n; h++)
if (key.equalsIgnoreCase(person[h].name)) return h;
return -1;
} // end sequentialSearch
} // end class SearchTest
class Person {
String name;
int age;
char gender;
Person(String n, int a, char g) {
name = n;
age = a;
gender = g;
}
} //end class Person