Supporting code for the 'There's a loop for each of us' blog post

ForEach.java

package com.oopuniversity.basics.loops;

import com.oopuniversity.basics.classes.Person;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * Created by OOPUniversity on 11/15/2015.
 */
public class ForEach {

    public static void main(String[] args) {
        List personList = buildPersonList();

        String [] simpleList = { "First", "Second", "Fifteenth?" };

        printPersonList1(personList);
        printPersonList2(personList);
        printPersonList3(personList);
        printPersonList4(personList);
        printPersonList5(personList);

        printStringArray(simpleList);
    }


    private static List <Person> buildPersonList() {
        List <Person> personList = new ArrayList<>();
        Person p = new Person("John", "Doe");
        personList.add(p);
        p = new Person("Satoshi", "Nakamoto");
        personList.add(p);
        p = new Person("Athena", "Momandpopadopolis");
        personList.add(p);
        return personList;
    }

    public static void printPersonList1(List personList) {
        System.out.println("Using a 'while' loop the JDK 1.4 (and earlier) way:");
        Iterator iter = personList.iterator();
        while(iter.hasNext()) {
            Person p = (Person) iter.next();
            System.out.println(p.getFirstName() + " " + p.getLastName());
        }
        System.out.println();
    }

    public static void printPersonList2(List personList) {
        System.out.println("Using a 'while' loop with generics:");
        Iterator <Person> iter = personList.iterator();
        while(iter.hasNext()) {
            Person p = iter.next();
            System.out.println(p.getFirstName() + " " + p.getLastName());
        }
        System.out.println();
    }

    public static void printPersonList3(List<Person> personList) {
        System.out.println("Using a 'for' loop with generics:");
        Person p = null;
        for(Iterator <Person> iter = personList.iterator(); iter.hasNext(); ) {
            p = iter.next();
            System.out.println(p.getFirstName() + " " + p.getLastName());
        }
        System.out.println();
    }

    public static void printPersonList4(List<Person> personList) {
        System.out.println("Using a 'for' loop with no iterator:");
        Person p = null;
        for(int i = 0; i < personList.size(); i++) {
            p = personList.get(i);
            System.out.println(p.getFirstName() + " " + p.getLastName());
        }
        System.out.println();
    }

    public static void printPersonList5(List<Person> personList) {
        System.out.println("Using a 'for each' loop:");
        for(Person p:personList) {
            System.out.println(p.getFirstName() + " " + p.getLastName());
        }
        System.out.println();
    }

    private static void printStringArray(String[] aList) {
        System.out.println("The enhanced for can also work on array types:");
        for(String s: aList) {
            System.out.println(s);
        }
        System.out.println();
    }

}

Person.java

package com.oopuniversity.basics.classes;

/**
 * Created by OOPUniversity on 11/15/2015.
 */
public class Person {
    private String firstName;
    private String lastName;

    public Person(String newFirstName, String newLastName) {
        firstName = newFirstName;
        lastName = newLastName;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String newFirstName) {
        firstName = newFirstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String newLastName) {
        lastName = newLastName;
    }
}