diff --git a/.inscode b/.inscode
index 013a2ba36c6eb0e38b35a6c8db98cdb8dfe02a39..557edd83095590e4b0fa3a215a23bfa2809727aa 100644
--- a/.inscode
+++ b/.inscode
@@ -1 +1 @@
-run = "java algo/Select.java"
+run = "java Main.java"
diff --git a/Main.java b/Main.java
index 1a68b2dd0a36d3447eed91dc217b0ec3bb12c172..20bf6961dc5b6dcb180c4f5645ffe4759e6ebf4b 100644
--- a/Main.java
+++ b/Main.java
@@ -1,5 +1,8 @@
-class Main {
+public class Main {
   public static void main(String[] args) {
-    System.out.println("Hello world!");
+      algo.Bubble.sort(new int[] { 2, 4, 3, 5, 1, 6 });
+      algo.Select.sort(new int[] { 2, 4, 3, 5, 1, 6 });
+      algo.Heap.sort(new int[] { 2, 4, 3, 5, 1, 6 });
+      algo.Quick.sort(new int[] { 2, 4, 3, 5, 1, 6 });
   }
-}
\ No newline at end of file
+}
diff --git a/algo/Bubble.java b/algo/Bubble.java
new file mode 100644
index 0000000000000000000000000000000000000000..7d0d275f4fcc10a4323bdcbdbe21983cfa8dbb86
--- /dev/null
+++ b/algo/Bubble.java
@@ -0,0 +1,23 @@
+package algo;
+
+import java.util.Arrays;
+
+public class Bubble {
+    public static void main(String[] args) {
+        Select.sort(new int[] { 2, 4, 3, 5, 1, 6 });
+    }
+
+    public static void sort(int[] nums) {
+
+        for (var i = 0; i < nums.length; i++) {
+            for (var j = 0; j < nums.length - i - 1; j++) {
+                if (nums[j] > nums[j + 1]) {
+                    var t = nums[j];
+                    nums[j] = nums[j + 1];
+                    nums[j + 1] = t;
+                }
+            }
+        }
+        System.out.println(Arrays.toString(nums));
+    }
+}
\ No newline at end of file
diff --git a/algo/Heap.java b/algo/Heap.java
new file mode 100644
index 0000000000000000000000000000000000000000..89cc06fe2392869aac614781fe2995e49e4ce781
--- /dev/null
+++ b/algo/Heap.java
@@ -0,0 +1,36 @@
+package algo;
+
+import java.util.Arrays;
+
+public class Heap {
+    public static void main(String[] args) {
+        Heap.sort(new int[] { 2, 4, 3, 5, 1, 6 });
+    }
+
+    public static void sort(int[] nums) {
+        for (var i = nums.length / 2 - 1; i >= 0; i--) {
+            heapify(nums, i, nums.length);
+        }
+        for (var i = nums.length - 1; i >= 0; i--) {
+            var t = nums[i];
+            nums[i] = nums[0];
+            nums[0] = t;
+            heapify(nums, 0, i);
+        }
+        System.out.println(Arrays.toString(nums));
+    }
+    
+    public static void heapify(int[] nums, int root, int len) {
+        var child = root * 2 + 1;
+        if (root < len && child < len) {
+            if (child + 1 < len && nums[child] < nums[child + 1])
+                child++;
+            if (nums[root] < nums[child]) {
+                var t = nums[root];
+                nums[root] = nums[child];
+                nums[child] = t;
+                heapify(nums, child, len);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/algo/Quick.java b/algo/Quick.java
new file mode 100644
index 0000000000000000000000000000000000000000..2d633df9c89fcc28de3a09d166a752dc6c85759d
--- /dev/null
+++ b/algo/Quick.java
@@ -0,0 +1,37 @@
+package algo;
+
+import java.util.Arrays;
+
+public class Quick {
+    public static void main(String[] args) {
+        Quick.sort(new int[] { 2, 4, 3, 5, 1, 6 });
+    }
+
+    public static void sort(int[] nums) {
+        partition(nums, 0, nums.length - 1);
+        System.out.println(Arrays.toString(nums));
+    }
+
+    public static void partition(int[] nums, int left, int right) {
+        if (left < right) {
+            int base = nums[left], i = left, j = right;
+            while (i < j) {
+                while (i < j && nums[j] >= base) {
+                    j--;
+                }
+                if (i < j) {
+                    nums[i] = nums[j];
+                }
+                while (i < j && nums[i] <= base) {
+                    i++;
+                }
+                if (i < j) {
+                    nums[j] = nums[i];
+                }
+            }
+            nums[i] = base;
+            partition(nums, left, i);
+            partition(nums, i + 1, right);
+        }
+    }
+}
\ No newline at end of file
diff --git a/algo/Select.java b/algo/Select.java
index 65de55030d44e495354d4b2d91234e600e484d86..5f24dcb76d5b4b334e09b0add9d5432caccf2950 100644
--- a/algo/Select.java
+++ b/algo/Select.java
@@ -23,4 +23,4 @@ public class Select {
         }
         System.out.println(Arrays.toString(nums));
     }
-}
+}
\ No newline at end of file