add print content

src/class06/Code04_CopyListWithRandom.java

@@ -117,11 +117,18 @@ public class Code04_CopyListWithRandom {
 		head.next.next.next.next.rand = null; // 5 -> null
 		head.next.next.next.next.next.rand = head.next.next.next; // 6 -> 4
 
+		System.out.println("原始链表：");
 		printRandLinkedList(head);
+		System.out.println("=========================");
 		res1 = copyListWithRand1(head);
+		System.out.println("方法一的拷贝链表：");
 		printRandLinkedList(res1);
+		System.out.println("=========================");
 		res2 = copyListWithRand2(head);
+		System.out.println("方法二的拷贝链表：");
 		printRandLinkedList(res2);
+		System.out.println("=========================");
+		System.out.println("经历方法二拷贝之后的原始链表：");
 		printRandLinkedList(head);
 		System.out.println("=========================");