Java计算圆的容积和体积

package project

import java.net.SocketTimeoutException;

public class test {

    static String test1="hello";

    public static void main(String[] args){

        String test2="world";

        System.out.println("hello world!");

        int r =5,h = 3 ;

        double area=Math.PI*r*r;

        double volume=area*3;

        double rom=volume*750;

        System.out.println("体积大小是："+volume);

        System.out.println("容积大小是："+rom);

}

}