Set测试类

demo1/src/test/java/cn/freemud/demo/SetTest.java

@@ -38,4 +38,64 @@ public class SetTest {
         empty = set.isEmpty();
         System.out.println("empty:" + empty);
     }
+
+    /**
+     * 测试Set集合的contains方法
+     * 判断集合里面是否有指定的对象
+     */
+    @Test
+    public void containsTest() {
+        Set set = new HashSet();
+        boolean flag = set.contains("zhangsan");
+        System.out.println("flag:" + flag);
+        set.add("zhangsan");
+        set.add("lisi");
+        flag = set.contains("zhangsan");
+        System.out.println("flag:" + flag);
+    }
+
+    /**
+     * 测试Set集合的toArray方法
+     * 将集合转换为数据
+     */
+    @Test
+    public void toArrayTest() {
+        Set set = new HashSet();
+        set.add("zhangsan");
+        set.add("lisi");
+        Object[] objects = set.toArray();
+        for (Object o : objects
+        ) {
+            System.out.println("o:" + o);
+        }
+    }
+
+    /**
+     * 测试Set集合的remove方法
+     * 移除指定的对象
+     */
+    @Test
+    public void removeTest() {
+        Set set = new HashSet();
+        set.add("zhangsan");
+        set.add("lisi");
+        set.remove("lisi");
+        System.out.println("set:" + set);
+    }
+  /**
+     * 测试Set集合的clear方法
+     * 清空集合
+     */
+    @Test
+    public void clearTest() {
+        Set set = new HashSet();
+        set.add("zhangsan");
+        set.add("lisi");
+        System.out.println("isEmpty:" + set.isEmpty());
+        set.clear();
+        System.out.println("isEmpty:" + set.isEmpty());
+
+    }
+
+
 }