import java.util.Scanner;

public class Main01{

public static void main(String[] args) {

Main01.io_scanner();

Main01.io_format();

}

public static void io_scanner() {

System.out.println("\n#io_scanner");

Scanner z1 = new Scanner(System.in);

System.out.print("input whatya: ");

String z4 = z1.nextLine();

System.out.printf("the whole line: %s\n", z4);

System.out.print("input an integer: ");

int z2 = z1.nextInt();

System.out.printf("square of %d is: %d\n", z2, z2*z2);

System.out.print("input an double: ");

double z3 = z1.nextDouble();

System.out.printf("square of %f is: %f\n", z3, z3*z3);

z1.close();

}

public static void io_format() {

System.out.println("\nio_format");

System.out.printf("%s is %d years old\n", "Bob", 233);

System.out.printf("%d; %x\n", 233, 233, 2.33); // 233; e9

System.out.printf("%f; %7.2f; %e; %+.2f\n", 233.0, 233.0, 233.0, 233.0);

System.out.printf("%2$d %3$d %1$d\n", 3, 2, 3);

}

}