update lab4 (+ added JavaDoc)

src/lab4/Furniture.java

@@ -1,13 +1,16 @@
 package lab4;
 
 
-///**
-// * My class Furniture.
-// */
+import java.util.Objects;
+
+/**
+ * My class Furniture.
+ */
 //todo uncomment /*<Furniture>*/
 public /*abstract*/ class Furniture/*<T>*/ implements Comparable<Furniture> {
+
     /**
-     *
+     * Material with which furniture was made of
      */
     private String material;
     private int length;
@@ -22,7 +25,9 @@ public /*abstract*/ class Furniture/*<T>*/ implements Comparable<Furniture> {
 //    }
 
     /**
-     * @param material
+     * Our class constructor.
+     *
+     * @param material Material with which furniture was made of
      * @param length
      * @param height
      * @param width
@@ -90,4 +95,22 @@ public /*abstract*/ class Furniture/*<T>*/ implements Comparable<Furniture> {
 //                : -material.compareTo(o.material);
                 : o.material.compareTo(material);
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Furniture furniture = (Furniture) o;
+        return length == furniture.length && height == furniture.height && width == furniture.width
+                && price == furniture.price && material.equals(furniture.material);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(material, length, height, width, price);
+    }
 }

src/lab4/Main.java

@@ -6,10 +6,14 @@ import java.util.Comparator;
 public class Main {
     public static void main(String[] args) {
         System.out.println(Integer.MIN_VALUE - 1);
-        //todo equals+hashcode
-//        todo JavaDoc
-        final Furniture/*<Furniture>*/ furniture1 = new Furniture("A", 1, 1, 1, 1);
-        final Furniture/*<String>*/ furniture2 = new Furniture("F", 1, 1, 1, 4);
+        /*final*/ Furniture/*<Furniture>*/ furniture1 = new Furniture("A", 1, 1, 1, 1);
+        final Furniture/*<String>*/ furniture2 = new Furniture("A", 2, 1, 1, 1);
+
+//        furniture1 = null;
+
+        System.out.println(furniture1.equals(furniture2));
+        System.out.println(furniture1.hashCode());
+        System.out.println(furniture2.hashCode());
 
         System.out.println(furniture1.compareTo(furniture2));
 //        System.out.println(furniture1.compareTo("furniture2"));