diff --git a/codes/lostdance/19859399.java b/codes/lostdance/19859399.java
new file mode 100644
index 0000000000000000000000000000000000000000..d9bd1a23a875025c3d7e0fa22e58c9fa0caeeac9
--- /dev/null
+++ b/codes/lostdance/19859399.java
@@ -0,0 +1,17 @@
+public static void bubbleSort(int [] a, int n){
+        boolean swapped;
+        for (int i = 0; i < n - 1; i++) {
+            swapped = false;
+            for (int j = 0; j < n - 1 - i; j++) {
+                if (arr[j] > arr[j + 1]) {
+                    // 交换元素
+                    int temp = arr[j];
+                    arr[j] = arr[j + 1];
+                    arr[j + 1] = temp;
+                    swapped = true;
+                }
+            }
+            // 如果没有发生交换，说明已经有序，提前终止
+            if (!swapped) break;
+        }
+}