diff --git a/java/NewId.java b/java/NewId.java
new file mode 100644
index 0000000000000000000000000000000000000000..f22d24297d3d308eafaf25abafa7999633958f92
--- /dev/null
+++ b/java/NewId.java
@@ -0,0 +1,28 @@
+
+import Java.util.Random;
+
+class SomeBizOperation {
+
+    /*疯狂到令人发指*/
+    public String getNewId() {
+
+        while (true) {
+            String id = newId(10);
+            var obj = SomeTableQuery.getById(id);
+            if (obj == null) {
+                return obj;
+            }
+        }
+    }
+
+    private String newId(int length) {
+        String str = "0123456789";
+        var random = new Random();
+        StringBuffer sb = new StringBuffer();
+        for (int i =0; i<length; i++){
+            int number = random.next(62);
+            sb.append(str.charAt(number));
+        }
+        return sb.toString();
+    }
+}
\ No newline at end of file