把test.java救回来了

实验7/src/task1/HelloCollections.java

@@ -1,12 +1,12 @@
-//HelloCollections.java
-package task1;
-
-import java.util.ArrayList;
-
-public class HelloCollections {
-    public ArrayList run() {
-        ArrayList<String> list = new ArrayList<>();
-        list.add("hello, world");
-        return list;
-    }
+//HelloCollections.java
+package task1;
+
+import java.util.ArrayList;
+
+public class HelloCollections {
+    public ArrayList run() {
+        ArrayList<String> list = new ArrayList<>();
+        list.add("hello, world");
+        return list;
+    }
 }

实验7/src/task1/test.java

@@ -0,0 +1,12 @@
+//test.java
+package task1;
+
+import java.util.ArrayList;
+
+public class test {
+    public static void main(String[] args) {
+        HelloCollections h1 = new HelloCollections();
+        ArrayList a1 = h1.run();
+        System.out.println(a1);
+    }
+}

实验7/src/task2/WalkCollection.java

@@ -1,25 +1,25 @@
-package task2;
-
-import java.util.ArrayList;
-import java.util.Iterator;
-
-public class WalkCollection {
-    public static void main(String[] args) {
-        ArrayList arrayListExample = new ArrayList();
-        // ---------------------Begin------------------------
-        // arrayListExample.add("aaa");
-        // arrayListExample.add("bbb");
-        // arrayListExample.add("ccc");
-        // arrayListExample.add("ddd");
-        // 展示运行结果前删下注释
-        // 使用迭代器iterator遍历arrayListExample集合
-        Iterator itr = arrayListExample.iterator();
-        while (itr.hasNext()) {
-            System.out.println(itr.next());
-        }
-
-        // 使用foreach遍历arrayListExample集合
-        arrayListExample.forEach(System.out::println);
-        // ---------------------End------------------------
-    }
+package task2;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+
+public class WalkCollection {
+    public static void main(String[] args) {
+        ArrayList arrayListExample = new ArrayList();
+        // ---------------------Begin------------------------
+        // arrayListExample.add("aaa");
+        // arrayListExample.add("bbb");
+        // arrayListExample.add("ccc");
+        // arrayListExample.add("ddd");
+        // 展示运行结果前删下注释
+        // 使用迭代器iterator遍历arrayListExample集合
+        Iterator itr = arrayListExample.iterator();
+        while (itr.hasNext()) {
+            System.out.println(itr.next());
+        }
+
+        // 使用foreach遍历arrayListExample集合
+        arrayListExample.forEach(System.out::println);
+        // ---------------------End------------------------
+    }
 }

实验7/src/task3/HelloSet.java

@@ -1,21 +1,21 @@
-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------------------------
-        hashSet.add("helloHashSet");
-        hashSet.remove("cat");
-        hashSet.add("fish");
-        hashSet.remove("apple");
-        // ---------------------End------------------------
-        hashSet.forEach(ele -> System.out.println(ele));
-    }
+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------------------------
+        hashSet.add("helloHashSet");
+        hashSet.remove("cat");
+        hashSet.add("fish");
+        hashSet.remove("apple");
+        // ---------------------End------------------------
+        hashSet.forEach(ele -> System.out.println(ele));
+    }
 }

实验7/src/task4/HelloHashMap.java

@@ -1,21 +1,21 @@
-package task4;
-
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Scanner;
-
-public class HelloHashMap {
-    public static void main(String[] args) {
-        Scanner scanner = new Scanner(System.in);
-        HashMap hashMapExample = new HashMap<>();
-        for (int i = 0; i < 2; i++) {
-            hashMapExample.put(scanner.next(), scanner.next());
-        }
-        // ---------------------Begin------------------------
-        hashMapExample.put("name", "lihong");
-        hashMapExample.remove("firstkey");
-        hashMapExample.replace("secondkey", "educode");
-        System.out.println(hashMapExample);
-        // ---------------------End------------------------
-    }
-}
+package task4;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Scanner;
+
+public class HelloHashMap {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        HashMap hashMapExample = new HashMap<>();
+        for (int i = 0; i < 2; i++) {
+            hashMapExample.put(scanner.next(), scanner.next());
+        }
+        // ---------------------Begin------------------------
+        hashMapExample.put("name", "lihong");
+        hashMapExample.remove("firstkey");
+        hashMapExample.replace("secondkey", "educode");
+        System.out.println(hashMapExample);
+        // ---------------------End------------------------
+    }
+}