java语言程序设计题

Question

1.编写一个完整的java Application程序。包含接口ShapeArea,MyRectangle类，MyTriangle类及Test类。

2，编写一个完整的java Application程序。包含接口ShapeArea,类Circle、Rectangle、Test。谢谢网友的帮助！！！

Answer 1

public interface ShapeArea(){
public double area();
}
public class MyRectangle(){
public static double area(double x,double y){
return x*y;
}
public class MyTriangle(){
public static double area(double x,double y,double z){
double s=x+y+z;
returnMath.sqrt(s*(s-x)*(s-y)*(s-z));
}
public class Test(){
public static void mian(String[] args){
System.out.println(MyRectangle.area(5,10));
System.out.println(MyTriangle.area(3,4,5));
}
}
}