update

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

@@ -14,16 +14,15 @@ import java.util.*;
 
 public class CollectionTests {
 
+    User zs = new User(1L,"张三");
+    User ls = new User(2L,"李四");
+    User ww = new User(3L,"王五");
+    User zl = new User(4L,"郑六");
     @Test
-    public void TestList(){
-
+    public void LinkedListTest(){
         //LinkedList
         LinkedList<User> userLinkedList = Lists.newLinkedList();
 
-        User zs = new User(1L,"张三");
-        User ls = new User(2L,"李四");
-        User ww = new User(3L,"王五");
-        User zl = new User(4L,"郑六");
         // LinkedList 可重复
         userLinkedList.add(zs);
         userLinkedList.add(zs);
@@ -40,6 +39,7 @@ public class CollectionTests {
 
         Assert.assertSame(userLinkedList.get(0),userLinkedList.get(1));
 
+
         // LinkedList 先后有序保存
         userLinkedList.removeFirst();
         userLinkedList.removeLast();
@@ -52,6 +52,10 @@ public class CollectionTests {
 
         ckUsers.add(zl);
         Assert.assertNotEquals(JSON.toJSONString(userLinkedList),JSON.toJSONString(ckUsers));
+    }
+
+    @Test
+    public void ArrayListTest(){
 
         //ArrayList
 
@@ -63,6 +67,13 @@ public class CollectionTests {
 
         Assert.assertSame(zs,ss);
 
+
+
+
+    }
+
+    @Test
+    public void HashSetTest(){
         //HashSet
 
         HashSet<Long> userHashSet = Sets.newHashSet();
@@ -75,7 +86,5 @@ public class CollectionTests {
         System.out.println(JSON.toJSONString(userHashSet));
 
         Assert.assertEquals(JSON.toJSONString(userHashSet),"[1,2]");
-
-
     }
 }

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

@@ -21,11 +21,12 @@ import static com.google.common.base.Preconditions.*;
 
 public class IOTests {
 
+    String content = "this is test file.";
+    String fileName = "D:/java-training/test1.md";
+
     @Test
-    public void Test(){
+    public void IOFileReadWriteTest(){
 
-        String content = "this is test file.";
-        String fileName = "D:/java-training/test1.md";
         checkNotNull(fileName,"test fileName must not be null.");
 
         File testFile = new File(fileName);
@@ -70,59 +71,65 @@ public class IOTests {
 
             Assert.assertEquals(fileInputStreamContent,content);
 
-            String copyFileName = "D:/java-training/test1_copy.md";
-            String copyFileName2 = "D:/java-training/test1_copy2.md";
-            File copyFile = new File(copyFileName);
-            File copyFile2 = new File(copyFileName2);
+        }
+        catch (IOException fileIoEx){
+            String ss = fileIoEx.toString();
+            System.out.print(ss);
+
+        }
+    }
+
+    @Test
+    public void IOFileStreamReadWriteTest(){
+        File testFile = new File(fileName);
+        String copyFileName = "D:/java-training/test1_copy.md";
+        String copyFileName2 = "D:/java-training/test1_copy2.md";
+        File copyFile = new File(copyFileName);
+        File copyFile2 = new File(copyFileName2);
+        if(copyFile.exists())
             copyFile.delete();
+        if(copyFile2.exists())
             copyFile2.delete();
 
-            FileOutputStream fileOutputStream = null;
+        FileOutputStream fileOutputStream = null;
+        try {
+            Files.createParentDirs(copyFile);
+            fileOutputStream = new FileOutputStream(copyFile);
+            fileOutputStream.write(content.getBytes());
+            fileOutputStream.flush();
+        }catch (IOException e){
+            e.printStackTrace();
+        }finally {
+            //关闭文件流
             try {
-                Files.createParentDirs(copyFile);
-                fileOutputStream = new FileOutputStream(copyFile);
-                fileOutputStream.write(content.getBytes());
-                fileOutputStream.flush();
-            }catch (IOException e){
+                fileOutputStream.close();
+            } catch (IOException e) {
                 e.printStackTrace();
-            }finally {
-                //关闭文件流
-                try {
-                    fileOutputStream.close();
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
             }
+        }
 
-            FileOutputStream fos = null;
+        FileOutputStream fos = null;
+        try {
+            FileInputStream fis = new FileInputStream(testFile);
+            fos = new FileOutputStream(copyFileName2);
+            byte[] buf = new byte[fis.available()];
+            fis.read(buf);
+
+            fos.write(buf);
+            fos.flush();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }finally {
+            //关闭文件流
             try {
-                FileInputStream fis = new FileInputStream(testFile);
-                fos = new FileOutputStream(copyFileName2);
-                byte[] buf = new byte[fis.available()];
-                fis.read(buf);
-
-                fos.write(buf);
-                fos.flush();
-            } catch (Exception e) {
+                fos.close();
+            } catch (IOException e) {
                 e.printStackTrace();
-            }finally {
-                //关闭文件流
-                try {
-                    fos.close();
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
             }
-
-            Assert.assertTrue(new File(copyFileName).exists());
-            Assert.assertTrue(new File(copyFileName2).exists());
-
-
         }
-        catch (IOException fileIoEx){
-            String ss = fileIoEx.toString();
-            System.out.print(ss);
 
-        }
+        Assert.assertTrue(new File(copyFileName).exists());
+        Assert.assertTrue(new File(copyFileName2).exists());
+
     }
 }

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

@@ -11,14 +11,16 @@ import java.util.LinkedHashMap;
 
 public class MapTests {
 
+    User user1 = new User(1L,"张三");
+    User user2 = new User(2L,"李四");
+    User user3 = new User(3L,"王五");
+
+
     @Test
-    public void Test() {
+    public void HashMapTest() {
 
         //HashMap 无序排列 效率较高
         HashMap<String,User> userHashMap = Maps.newHashMap();
-        User user1 = new User(1L,"张三");
-        User user2 = new User(2L,"李四");
-        User user3 = new User(3L,"王五");
         userHashMap.put("xxx",user1);
         userHashMap.put("aaa",user2);
         userHashMap.put("sss",user3);
@@ -30,6 +32,11 @@ public class MapTests {
 
         System.out.println(userHashMap);
 
+
+    }
+
+    @Test
+    public void LinkedHashMapTest(){
         //LinkedHashMap 自动排序 效率较低
         LinkedHashMap<String,User> userLinkedHashMap = Maps.newLinkedHashMap();