import静态的类

import static java.lang.System.out;//import静态的类import static java.lang.Math.*;class WithStatic{public static void main(String [] args){out.println("sqrt"+sqrt(2.0));out.println("tan"+tan(60));}}

import java.lang.Math;//no import静态的类class NoStatic {public static void main(String [] args){System.out.println("sqrt"+Math.sqrt(2.0));System.out.println("tan"+Math.tan(60));}}