public class HelloWorld {

    public static void main(String[] args) {

int age=25;

if(age>60){

    System.out.println("老年");

}else if（age>40）{

    System.out.println("中年");

}else if（age>18）{

    System.out.println("青年");

}else{

    System.out.println("少年");

}

}

}