几何图形计算器的设计与实现----代码实现

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点此处查看 课程设计说明书

1.创建实体类：

// Circle.java
public class Circle {private double r;public double getR() {return r;}public void setR(double r) {this.r = r;}@Overridepublic String toString() {return "Circle [r=" + r + "]";}public Circle() {super();}public Circle(double r) {super();this.r = r;}public double Circle_Space(){double space=3.14*r*r;		return Math.round(space*100)/100.00;}public double Circle_Girth(){double girth=2*3.14*r;return Math.round(girth*100)/100.00;}
}

// Column.java public class Column {private double r;private double h;public double getR() {return r;}public void setR(double r) {this.r = r;}public double getH() {return h;}public void setH(double h) {this.h = h;}@Overridepublic String toString() {return "Column [r=" + r + ", h=" + h + "]";}public Column() {super();}public Column(double r, double h) {super();this.r = r;this.h = h;}public double Column_bottom_Space(){double space=3.14*r*r;return Math.round(space*100)/100.00;}public double Column_Surface_Space(){double space= 6.28*r*r+2*r*3.14*h;return Math.round(space*100)/100.00;}public double Column_Volume(){double volume= 3.14*r*r*h;return Math.round(volume*100)/100.00;}}

// Rectangle.javapublic class Rectangle {
    private double height;
    private double width;
    public double getHeight() {
        return height;
    }
    public void setHeight(double height) {
        this.height = height;
    }
    public double getWidth() {
        return width;
    }
    public void setWidth(double width) {
        this.width = width;
    }
    @Override
    public String toString() {
        return "Rectangle [height=" + height + ", width=" + width + "]";
    }
    
    public Rectangle() {
        super();
    }
    public Rectangle(double height, double width) {
        super();
        this.height = height;
        this.width = width;
    }
    public double Rectangle_Girth(){
        double girth=2*(height+width);
        return Math.round(girth*100)/100.00;
    }
    public double Rectangle_Space(){
        double space=    height*width;
        return  Math.round(space*100)/100.00;
        
    }
}

// Triangle.java public class Triangle {
    private double a;
    private double b;
    private double c;
    
    public double getA() {
        return a;
    }    public void setA(double a) {
        this.a = a;
    }    public double getB() {
        return b;
    }    public void setB(double b) {
        this.b = b;
    }    public double getC() {
        return c;
    }    public void setC(double c) {
        this.c = c;
    }    @Override
    public String toString() {
        return "Triangle [a=" + a + ", b=" + b + ", c=" + c + "]";
    }
    
    public Triangle() {
        super();
    }
    public Triangle(double a, double b, double c) {
        super();
        this.a = a;
        this.b = b;
        this.c = c;
    }
    public  boolean isTriangle(){
        if (a+b>c&&a+c>b&&b+c>a)
            return true;
        else
            return false;
    }
    public double Triangle_Girth(){
        
        return Math.round((a+b+c)*100)/100.00;
    }
    public double Triangle_Space(){
        //System.out.println(a*b*c);
        double p = (a+b+c) / 2;
        double space=Math.pow(p*(p-a)*(p-b)*(p-c), 0.5);
        return  Math.round((space)*100)/100.00;
    }}

2.创建视图

// Main.javaimport java.awt.*;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.ItemEvent;
import java.awt.e

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