Initial commit

.gitignore

+# Project-specific
+# none (for now)
+
+# Mac file finder metadata
+.DS_Store
+
+# Java files
+*.class
+
+# Emacs backup file
+*~
+
+# IntelliJ files
+.idea/
+out/
+*.iml
+*.iws
+*.ipr
+
+# Eclipse files
+bin/
+.settings/
+.classpath
+.project
+
+# Visual Studio / VS Code files
+.vs*/
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Netbeans files
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+nbactions.xml
+nb-configuration.xml
+
+# Maven
+target/
+
+# Miscellaneous
+tmp/
+*.tmp
+*.bak
+*.swp
+

src/edu/unl/cse/csce361/ConcretePerson.java

+package edu.unl.cse.csce361;
+
+public class ConcretePerson implements Person {
+    private String name;
+    private String phoneNumber;
+
+    public ConcretePerson(String name, String phoneNumber) {
+        this.name = name;
+        this.phoneNumber = phoneNumber;
+    }
+
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public String getPhoneNumber() {
+        return phoneNumber;
+    }
+
+    @Override
+    public String toString() {
+        return getName() + "\t" + getPhoneNumber();
+    }
+}

src/edu/unl/cse/csce361/Main.java

+package edu.unl.cse.csce361;
+
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.stream.Stream;
+
+public class Main {
+
+
+    private static Set<Person> populatePeople() {
+        Set<Person> people = new HashSet<>();
+        Person person = new ConcretePerson("Jenny", "867-5309");
+        people.add(person);
+        person = new ConcretePerson("Glenn Miller", "Pennsylvania 6-5000");
+        people.add(person);
+        person = new ConcretePerson("The Marvelettes", "Beechwood 4-5789");
+        people.add(person);
+        person = new ConcretePerson("Information", "555-1212");
+        people.add(person);
+        return people;
+    }
+
+    private static Person iterateWithForEach(String targetName, Set<Person> people) {
+        Person targetPerson = null;
+        for (Person person : people) {
+            if (person.getName().equals(targetName)) {
+                targetPerson = person;
+                break;                              // Bad programmer! No cookie for you!
+            }
+        }
+        return targetPerson;
+    }
+
+
+    private static Person iterateWithLoopCounter(String targetName, Set<Person> people) {
+        Person candidatePerson;
+        Person targetPerson = null;
+        int counter = 0;
+        Person[] personArray = people.toArray(new Person[people.size()]);
+        while ((targetPerson == null) && counter < personArray.length) {
+            candidatePerson = personArray[counter];
+            if (candidatePerson.getName().equals(targetName)) {
+                targetPerson = candidatePerson;
+            }
+            counter++;
+        }
+        return targetPerson;
+    }
+
+
+    private static Person iterateWithHasNext(String targetName, Set<Person> people) {
+        Person candidatePerson;
+        Person targetPerson = null;
+        Iterator<Person> personIterator = people.iterator();
+        while ((targetPerson == null) && personIterator.hasNext()) {
+            candidatePerson = personIterator.next();
+            if (candidatePerson.getName().equals(targetName)) {
+                targetPerson = candidatePerson;
+            }
+        }
+        return targetPerson;
+    }
+
+    private static Person filterWithStream(String targetName, Set<Person> people) {
+        Stream<Person> personStream = people.stream().filter(person -> person.getName().equals(targetName));
+        return personStream.findAny().orElse(null);
+    }
+
+    public static void main(String[] args) {
+        Set<Person> people = populatePeople();
+        String targetName = "Information";
+        String absentName = "Foo";
+        System.out.println();
+        System.out.println("Iterating using For Each (Java 8)");
+        Person person = iterateWithForEach(targetName, people);
+        System.out.println(person);
+        person = iterateWithForEach(absentName, people);
+        System.out.println(person);
+        System.out.println();
+        System.out.println("Iterating using Loop Counter (Java 1)");
+        person = iterateWithLoopCounter(targetName, people);
+        System.out.println(person);
+        person = iterateWithLoopCounter(absentName, people);
+        System.out.println(person);
+        System.out.println();
+        System.out.println("Iterating using Next (Java 5)");
+        person = iterateWithHasNext(targetName, people);
+        System.out.println(person);
+        person = iterateWithHasNext(absentName, people);
+        System.out.println(person);
+        System.out.println();
+        System.out.println("Filtering using Stream (Java 8)");
+        person = filterWithStream(targetName, people);
+        System.out.println(person);
+        person = filterWithStream(absentName, people);
+        System.out.println(person);
+    }
+
+}

src/edu/unl/cse/csce361/Person.java

+package edu.unl.cse.csce361;
+
+public interface Person {
+    String getName();
+    String getPhoneNumber();
+}