使用静态导入导入类型的多个静态成员

import static java.lang.Math.PI;

import static java.lang.Math.sqrt;
/**
 from
* N o w J a v a . c o m 
**/

import static java.lang.System.out;


public class Main {  

  public static void main(String[] args) {

    double radius = 21.9;

    double area = PI * radius * radius;


    out.println("Value of PI is: " + PI);    

    out.println("Radius of circle: " + radius);    

    out.println("Area of circle: " + area);

    out.println("Square root of 2.0: " + sqrt(2.0));

  }

}