第七次实验课代码

添加C04~C07

C06 Polymorphism/src/shape/Shape.java

@@ -0,0 +1,52 @@
+package shape;
+import java.awt.*;
+
+public class Shape {
+    protected Color color;
+    protected int x,y;
+
+    public void setColor(Color color) {
+        this.color = color;
+    }
+    public Color getColor() {
+        return color;
+    }
+    public double getArea(){
+        return x*y;
+    }
+
+    public void setX(int x){
+        this.x=x;
+    }
+    public int getX(){
+        return x;
+    }
+
+    public void setY(int y){
+        this.y=y;
+    }
+    public int getY(){
+        return y;
+    }
+
+    public double getPerimeter(){
+        return x*y;
+    }
+
+    public void move(int dx,int dy){
+        x += dx;
+        y += dy;
+    }
+
+    public void draw(Graphics g){
+        g.setColor(color);
+        g.fillRect(x,y,1,1);
+    }
+
+    Shape(){}
+    Shape(Color color,int x,int y){
+        this.color=color;
+        this.x=x;
+        this.y=y;
+    }
+}