diff --git a/Shape.java b/Shape.java
new file mode 100644
index 0000000..46401d7
--- /dev/null
+++ b/Shape.java
@@ -0,0 +1,14 @@
+package 矩形与正方形（LSP）;
+
+
+/**
+ * 褰㈢姸鎺ュ彛锛堥潪 public锛屽彲鏀惧湪鍚屼竴鏂囦欢锛?
+ * @author 方初阳
+ * @version 1.0
+ * @created 23-10月-2025 20:05:46
+ */
+interface Shape {
+
+	public double getArea();
+
+}
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