Question

Write a static method named findMin that accepts an ArrayList of Person objects named list. Each Person object has private myAge and myName properties and corresponding public getAge and getName accessors. The method must return the name of the youngest person.

public static String findMin(ArrayList<Person>list)

{

Answer 1

The method you asked for:

public static Person findMin(ArrayList<Person> list) {

              // TODO Auto-generated method stub

              Person min = list.get(0);

              for(Person p:list) {

                     if(min.getMyAge()>p.getMyAge()) {

                           min = p;

                     }

              }

              return min;

       }

Whole code:

//Person.Java

public class Person{

       private int myAge=0;

       private String myName;

       public Person(int myAge, String myName) {

              // TODO Auto-generated constructor stub

              this.myAge = myAge;

              this.myName = myName;     

       }

       public Person() {

              // TODO Auto-generated constructor stub

       }

       public int getMyAge() {

              return myAge;

       }

       public void setMyAge(int myAge) {

              this.myAge = myAge;

       }

       public String getMyName() {

              return myName;

       }

       public void setMyName(String myName) {

              this.myName = myName;

       }

      

}//End of Person.java

//Tester.java

import java.util.ArrayList;

public class Tester {

      

       public static void main(String[] args) {

              Person p1 = new Person(16, "P1");

              Person p2 = new Person(18, "P2");

              Person p3 = new Person(19, "P3");

              Person p4 = new Person(15, "P4");

             

              ArrayList<Person> list = new ArrayList<Person>();

              list.add(p1);

              list.add(p2);

              list.add(p3);

              list.add(p4);

             

              Person min = findMin(list);

              System.out.println("Minimum Age Employee: "+min.getMyName()+" "+min.getMyAge());

       }

       public static Person findMin(ArrayList<Person> list) {

              // TODO Auto-generated method stub

              Person min = list.get(0);

              for(Person p:list) {

                     if(min.getMyAge()>p.getMyAge()) {

                           min = p;

                     }

              }

              return min;

       }

}

//End of Tester.java

Output: