FOR JAVA 1. Implement the following classes and interface in Java. Shape interface which has the following methods: –  public double perimeter(); // doesn’t have any parameters, re- turns the perimeter of the shape. –  public double area(); // doesn’t have any parameters, returns the area of the shape. –  public void info(); // doesn’t have any parameters, prints the perimeter and area of the shape. Circle class that implements Shape interface and has a constructor that takes the radius. Rectangle class that implements the Shape interface and has a con- structor that takes the width and height. Square class that extends the Rectangle class and has a constructor that takes the edge length. – Square constructor should only call the super constructor with correct parameters. – Square constructor should not explicitly implement the Shape class, but it should inherit the perimeter, area and info methods from the Rectangle class. 2. Create a Test class, and create one Circle, one Rectangle and one Square objects. Call their info method in main method.

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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FOR JAVA

1. Implement the following classes and interface in Java.

  • Shape interface which has the following methods:

    • –  public double perimeter(); // doesn’t have any parameters, re- turns the perimeter of the shape.

    • –  public double area(); // doesn’t have any parameters, returns the area of the shape.

    • –  public void info(); // doesn’t have any parameters, prints the perimeter and area of the shape.

  • Circle class that implements Shape interface and has a constructor that takes the radius.

  • Rectangle class that implements the Shape interface and has a con- structor that takes the width and height.

  • Square class that extends the Rectangle class and has a constructor that takes the edge length.

    – Square constructor should only call the super constructor with correct parameters.

    – Square constructor should not explicitly implement the Shape class, but it should inherit the perimeter, area and info methods from the Rectangle class.

    2. Create a Test class, and create one Circle, one Rectangle and one Square objects. Call their info method in main method.

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