把实验七实验报告里的代码拷进来了

实验7/src/task3/HelloSet.java

@@ -0,0 +1,17 @@
+package task3;
+
+import java.util.HashSet;
+import java.util.Scanner;
+
+public class HelloSet {
+    public static void main(String[] args) {
+        HashSet<Object> hashSet = new HashSet<>();
+        Scanner scanner = new Scanner(System.in);
+        for (int i = 0; i < 5; i++) {
+            hashSet.add(scanner.next());
+        }
+        // ---------------------Begin------------------------
+        // ---------------------End------------------------
+        hashSet.forEach(ele -> System.out.println(ele));
+    }
+}