no message

src/main/java/com/aa.java

@@ -1,5 +1,8 @@
 package com;
 
+
+import java.util.ArrayList;
+
 /**
  * @description:
  * @author: fufanrui
@@ -8,11 +11,16 @@ package com;
 public class aa {
     public static void main(String[] args) {
 
-        System.out.println("这是我测试的git可视化版本工具");
-
-        System.out.println("这是我测试的git可视化版本工具");
-
-        System.out.println("这是我测试的git可视化版本工具，我想玩玩他");
+        ArrayList<String> integers = new ArrayList<>();
+        integers.add("1");
+        integers.add("2");
+        integers.add("3");
+        integers.add("4");
+        StringBuilder stringBuilder = new StringBuilder();
+        for (String integer : integers) {
+            stringBuilder.append(integer);
+        }
+        System.out.println(stringBuilder);
 
     }
 }