20194680-- eighth job - inherited

Title: writing an application, create a rectangle class, a class with a long, wide two member variables and methods find the circumference. Then create a subclass of the class of rectangular - square classes, methods defined in the class seeking area, find the circumference rewriting method. In the main class, the input side length of a square, a square object is created, the square area and perimeter requirements. (Note: all classes are in a package)

 

cn\edu\ccut\java\Rectangle.java

Package cn.edu.ccut.java; 

/ * 
 * class encapsulates the Rectangle matrix length, width, area, perimeter and member variables parameterized constructor, find the area, find the circumference of an example method 
 * / 
public  class the Rectangle {
     Double length ;     // long rectangle 
    Double weight;     // width of the rectangle 
    
    public the rectangle ( Double length, Double weight) {
         the this .length = length;
         the this .Weight = weight; 
    } 
    / * 
     * a rectangular perimeter request 
     * / 
    public  Double the getPerimeter () {
         return 2 * (length + weight);  
    }
}

 

 

cn\edu\ccut\java\Square.java

Package cn.edu.ccut.java; 

/ * 
 * class inherits a square rectangle class, defines a square area demand method, a method of rewriting request square perimeter. 
 * / 
Public  class Square the extends the Rectangle { 
    
    / * 
     * constructor 
     * / 
    public Square ( Double length) {
         Super (length, length); 
    } 
    / * 
     * square area demand 
     * / 
    public  Double the getArea () {
         return  the this .length * the this .Weight; 
    } 
    / * 
     * a square perimeter request 
     * / 
    public  Double the getPerimeter () {
         return 2*(length+weight);
    }
}

 

 

cn\edu\ccut\java\MainTest_Square.java

Package cn.edu.ccut.java; 

Import java.util.Scanner; 

/ * 
 * class Square test 
 * / 
public  class MainTest_Square { 

    public  static  void main (String [] args) { 
        Scanner in = new new Scanner (the System.in); 
        System.out.println ( "Please enter a square:" );
         Double length = in.nextDouble (); 
        square square = new new square (length); 
        System.out.println ( "perimeter:" + square.getPerimeter ( ) + "area:" + square.getArea ()); 

    } 

}

 

 

operation result