demo.java

java课程的资料以及实验的代码

class Demo{
double x,y;
  Demo(double x,double y){this.x=x;this.y=y;}
  double ave(){return(x+y)/2;
}
}
class TestThisl{
    public static void main(String args[]){
    Demo s=new Demo(3,4);
    System.out.println(s.ave());
}
}