3段階目

em-oop/src/Circle.java

@@ -19,4 +19,25 @@ public class Circle extends Shape {
 		super.showInfo();
 		System.out.println("半径:" + this.radius);
 	}
+//	//Shapeクラスを継承
+//
+//	//フィールド作成
+//	private double radius;
+//
+//	//コンストラクタ作成
+//	public Circle(double radius) {
+//		super("円");
+//		this.radius = radius;
+//	}
+//
+//	//メソッド作成
+//	public double area() {
+//		return Math.PI * radius * radius;
+//	}
+//
+//	public void showInfo() {
+//		super.showInfo();
+//		System.out.println("(半径:" + this.radius + ")");
+//	}
+
 }

em-oop/src/Day3Check3.java

@@ -0,0 +1,13 @@
+
+public class Day3Check3 {
+	public static void main(String[] ages) {
+	
+	Shape shape1 = new Circle(2);
+	shape1.showInfo();
+	
+	Shape shape2 = new Rectangle(3, 4);
+	shape2.showInfo();
+	
+		
+	}	
+}

em-oop/src/Shape.java

@@ -1,20 +1,41 @@
+//
+//public abstract class Shape {
+//
+//	private String name;
+//	
+//	public Shape(String name) {
+//		this.name = name;
+//		
+//	}
+//	
+//	public abstract double area();
+//		//return 0.0;
+//		
+//	
+//	
+//	public void showInfo() {
+//		//System.out.println(this.name + "の面積は" + this.area() + "です");
+//		
+//	}
+public class Shape {
 
-public abstract class Shape {
-
+	//フィールド作成
 	private String name;
-	
+
+	//コンストラクタ作成
 	public Shape(String name) {
 		this.name = name;
-		
 	}
-	
-	public abstract double area();
-		//return 0.0;
-		
-	
-	
-	public void showInfo() {
-		//System.out.println(this.name + "の面積は" + this.area() + "です");
-		
+
+	//メソッド作成
+	double area() {
+		return 0.0;
 	}
+
+	//メソッド作成
+	void showInfo() {
+		//出力
+		System.out.println(this.name + "の面積は" + this.area() + "です");
+	}
+
 }