上传了实验三,已确认无敏感信息

实验3/src/test2/Circle.java

@@ -0,0 +1,16 @@
+//Circle.java
+package test2;
+
+public class Circle {
+    double radius;
+    double area;
+
+    public void set(double radius) {
+        this.radius = radius;
+    }
+
+    public void disaplay() {
+        area = radius * radius * 3.14;
+        System.err.println("This circle's radius is " + radius + ", area is " + area);
+    }
+}