chk same obj, not null, not expected class, values

Week 5: Class hierarchies/13B. Equals method for class Movie [4 basic chks]

@@ -0,0 +1,116 @@
+Class 'Movie' is defined in the following program.
+Write the 'equals' method to the class using the examples in this page.
+
+2 movies are equal, if ALL ATTRIBUTES have 'equal values'; 
+hence, the name, director and length should be equal.
+
+
+
+
+import java.util.Random;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+        Movie m = new Movie("Java and Me", "James Javason", 93);       
+        System.out.println("Movie: " + m);
+        
+        Movie m2 = new Movie("Java and Me", "Jane Javander", 93);        
+        Movie m3 = new Movie("Java and Me", "James Javason", 94);        
+        Movie m4 = new Movie("Python and me", "James Javason", 93);
+        Movie m5 = new Movie("Java and Me", "James Javason", 93);
+        
+        ArrayList<Movie> movies = new ArrayList<>(Arrays.asList(new Movie[] {m2,m3,m4,m5,m,null}));
+        Collections.shuffle(movies, r);
+        
+        movies.stream().forEach(mo -> compare(m, mo));
+        
+        System.out.println("Comparing to String \"Java and Me\"");
+        System.out.println("equals: " + (m.equals("Java and Me")));
+        
+        
+    }
+    
+    public static void compare(Movie m, Movie m2) {
+        System.out.println("Comparing to movie " + m2);
+        System.out.println("equals: " + (m.equals(m2)));
+    }
+}
+
+class Movie {
+    private String director;
+    private String name;
+    int length;
+    
+    public Movie(String director, String name, int length) {
+        this.director = director;
+        this.name = name;
+        this.length = length;
+    }
+    
+    public String toString() {
+        return name + " (" + director + "), " + length + " min.";
+    }
+
+
+
+    @Override
+    public boolean equals(Object m2) {
+        // same object
+        if (this == m2) {
+            return true;
+        }
+
+        // not null
+        if (m2 == null) {
+            return false;
+        }
+
+        // not 'Movie' class
+        if (m2.getClass() != Movie.class) {
+            return false;
+        }
+
+        
+        // convert into an object
+        Movie other = (Movie) m2;
+        // same values
+        if (this.director.equals(other.director) && this.name.equals(other.name) && this.length == other.length) {
+            return true;
+        }
+        else {
+            return false;
+        }
+    }
+
+
+
+
+
+}
+
+
+
+
+
+
+Movie: James Javason (Java and Me), 93 min.
+Comparing to movie James Javason (Python and me), 93 min.
+equals: false
+Comparing to movie James Javason (Java and Me), 93 min.
+equals: true
+Comparing to movie Jane Javander (Java and Me), 93 min.
+equals: false
+Comparing to movie James Javason (Java and Me), 94 min.
+equals: false
+Comparing to movie null
+equals: false
+Comparing to movie James Javason (Java and Me), 93 min.
+equals: true
+Comparing to String "Java and Me"
+equals: false
+