package java;

class ju{
    int a,b,area;//定义矩形的长宽；
public void Area1(){
    area=a*b;
    System.out.println("矩形的长为"+a+"宽为"+b+"其面积为"+area);
}
}
class li extends ju{
    int c;
    public void Area2(){
        area=(a*b+a*c+b*c)*2;
        System.out.println("矩形的长为"+a+"宽为"+b+"高为"+c+"其面积为"+area);
}
}

public class num1 {
public static void main(String[] args){
    li x=new li();
    x.a =1;
    x.b=2;
    x.c=3;
    x.Area1();
    x.Area2();
}
}

package应该是小写