testprograme.java

用java实现的测试程序

abstract class GeometricObject{
  private String color="yellow";
  private boolean filled=true;
  protected GeometricObject(){
  }
  protected GeometricObject(String color,boolean filled){
     this.color=color;
     this.filled=filled;
  }
  public String getColor(){
     return color;
  }
  public void setColor(){
     this.color=color;
  }
  public boolean isFilled(){
       return filled;
  }
  public void setFilled(boolean filled){
       this.filled=filled;
  }
  public abstract double getPerimeter();
  pubic abstract String printObject();
}
class Triangle extends GeometricObject{
    private double side1=1.0;
    private double side2=1.0;
    private double side3=1.0;
    public Triangle(double side1,double side2,double side3){
      this.side1=side1;
      this.side2=side2;
      this.side3=side3;
    }
    public double getSide1(){
         return side1;
    }
    public void setSide1(double side1){
        this.side1=side1;
    }
    public double getSide2(){
         return side2;
    }
    public void setSide2(double side2){
        this.side2=side2;
    }
    public double getSide3(){
         return side3;
    }
    public void setSide3(double side3){
        this.side3=side3;
    }
    public double getPerimeter(){
      return (side1+side2+side3)/2;
    }
    public double getArea(){
      return (Math.sqrt(getPerimeter()*(getPerimeter()-side1)*(getPerimeter()-side2)*(getPerimeter()-side3)));
    }
    public String toString(){
      return "This shape is triangle";
    }
    pubic String printObject(){
          Triangle.toString();
    }
}
class Circle extends GeometricObject{
      private double radius;
      public Circle(){
        this(1.0);
      }
      public Circle(double radius){
        this.radius=radius;
      }
      public double getRadius(){
         return radius;
      }
      public void setRadius(double radius){
           this.radius=radius;
      }
      public double getPerimeter(){
         return 2*3.14*radius;
      }
      public double getArea(){
          return 3.14*radius*radius;
      }
      public String toString(){
         return "This shape is circle";
      }
      pubic String printObject(){
          Triangle.toString();
      }
}
public class TestPrograme{
      public static void main(String[] args){
          GeometricObject[] objects={new Triangle(),new Circle()};
              for(int i=0;i<objects.length;i++)  
                    System.out.println(((GeometricObject)object[i]).printObject());
      }
}