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2020/06/26 08:33

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@@ -339,3 +339,57 @@
 Java
 ```
+public class DoublyElement {
+    private Object data;
+    private DoublyElement next, previous;
+    private DoublyElement () {
+    }
+    public DoublyElement (Object obj) {
+        this.data = obj;
+        }
+        public Object getData() {
+            return this.data;
+            }
+public DoublyElement getNextElement() {
+    return this.next;
+    }
+    public void setNextElement(DoublyElement nextElement) {
+        this.next = nextElement;
+        }
+        public DoublyElement getPreviousElement() {
+            return this.previous;
+        }
+        public void setPreviousElement(DoublyElement previousElement) {
+            this.previous = previousElement;
+        }public String toString() {
+            return this.data.toString();
+        }
+    }