package T092208;public class Shape {    private int bian;    private double zhouchang;    private double mianji;    public int getBian() {        return bian;    }    public void setBian(int bian) {        this.bian = bian;    }    public double getZhouchang() {        return zhouchang;    }    public void setZhouchang(double zhouchang) {        this.zhouchang = zhouchang;    }    public double getMianji() {        return mianji;    }    public void setMianji(double mianji) {        this.mianji = mianji;    }    public void bian(){        System.out.println("您创建了一个"+bian+"边形！");    }}package T092208;public class San extends Shape {    double[] bianchang=new double[3];    San(){            }    San(double a,double b, double c){        bianchang[0]=a;        bianchang[1]=b;        bianchang[2]=c;    }    public void zhouchang(){        if(getBian()==3&&bianchang[0]+bianchang[1]>bianchang[2]&&bianchang[0]-bianchang[1]<bianchang[2]){            double sum=0;            for(int i=0;i<bianchang.length;i++){                sum+=bianchang[i];                System.out.print(" 边长"+(i+1)+"是"+ bianchang[i]);            }            System.out.println(" 三角形的周长是："+sum);        }        else{            System.out.println("这不是一个三角形");        }    }}package T092208;public class juxing extends Shape {    double[] bianchang=new double[4];    juxing(){}    juxing(double a,double b,double c,double d){        bianchang[0]=a;        bianchang[1]=b;        bianchang[2]=c;        bianchang[3]=d;    }    public void zhouchang(){        if(getBian()==4 && bianchang[0]==bianchang[2]&&bianchang[1]==bianchang[3]){            double sum=0;            for(int i=0;i<bianchang.length;i++){                sum+=bianchang[i];                System.out.print(" 边长"+(i+1)+"是"+bianchang[i]);            }            System.out.println(" 矩形的周长是："+sum);        }        else{            System.out.println("这不是一个矩形");        }    }}package T092208;public class Test {    public static void main(String[] args){        Shape s=new Shape();        s.setBian(5);        s.bian();        San sa=new San(15,14,12);        sa.setBian(3);        sa.zhouchang();        juxing ju=new juxing(5,10,5,10);        ju.setBian(4);        ju.zhouchang();    }}