diff --git a/codes/piero_choi/19955133.java b/codes/piero_choi/19955133.java
new file mode 100644
index 0000000000000000000000000000000000000000..ca591876bf4567d99710d89f5d09b26f45e920af
--- /dev/null
+++ b/codes/piero_choi/19955133.java
@@ -0,0 +1,34 @@
+/**
+ * 冒泡排序函数
+ * aa bb cc
+ * @param a 待排序的数组
+ * @param n 待排序的数组长度
+ */
+public static void bubbleSort(int [] a, int n){
+
+	bubbleSort(a, 0, n-1);
+} //end
+
+public static void bubbleSort(int [] a, int low, int high) {
+
+    if (low >= high) return;
+
+    int pilot = a[high];
+    int i = low;
+
+    for (int j = low; j < high; j++) {
+    	if (a[j] < pilot) {
+            int tmp = a[j];
+	    a[j] = a[i];
+	    a[i] = tmp;
+	    i++;
+	}	
+    }
+
+    a[high] = a[i];
+    a[i] = pilot;
+
+    bubbleSort(a, low, i-1);
+    bubbleSort(a, i+1, high);
+
+}