java data types and scopes

import java.util.*;

public class Hi{
    public static void main(String[] args){
        System.out.println("Hello, Javaworld!");
        System.out.print("Goodbye!\n");
        System.out.print("new line please");
        System.out.println('[');
        System.out.println(3);
        System.out.println(3 + 3);
        System.out.println(3 + "3");
        byte x = -128;
        // от -2^7 до 2^7 - 1 (-128 до 127)

        short y = 1;
        // От -2^15 до 2^15 - 1

        int z = 1;
        // от -2^31 до 2^31 - 1

        long c = 1;
        // от -2^63 до 2^63 - 1

        System.out.println(x);
        System.out.println(x - 1);

        y = (short)(x - 1);
        System.out.println(y);

        x = 127;
        z = (int)(x + 1);
        System.out.println(z);

        x = (byte)z;
        System.out.println(x);

        c = Long.MAX_VALUE;
        // c = 10000000;
        System.out.println(c);

        x = (byte)c;
        System.out.println(x);

        String a = "Goodbye";
        System.out.printf("We say %s %d times.%n Alt+F4", a, z);

        // javac Hi.java / java Hi
    }
}