lab1.4 java

import java.util.Scanner;
public class Main
{
    public static void main(String[]args)
    {
        int dlina, polDliny, i, peremen;
        int[] massiv;
        boolean isInCorrect;
        dlina = 0;
        Scanner scan = new Scanner(System.in);
        System.out.print("The program reverses the array.\n");
        System.out.print("Enter array length: ");
        do
        {
            isInCorrect = false;
            try {
                dlina = Integer.parseInt(scan.next());
            }
            catch (NumberFormatException e) {
                System.out.print("Symbols have been entered. Enter the number: ");
                isInCorrect = true;
            }
            if ((!isInCorrect) && (dlina == 0) || (dlina < 0))
            {
                System.out.print("A negative value or zero was entered. Enter a valid
                                  value: ");
                isInCorrect = true;
            }
        } while (isInCorrect);
        massiv = new int[dlina];
        System.out.print("Enter array members: ");
        for (i = 0; i < dlina; i++) {
            do
            {
                isInCorrect = false;
                try {
                    massiv[i] = Integer.parseInt(scan.next());
                }
                catch (NumberFormatException e) {
                    System.out.print("Symbols have been entered. Enter the number:
                                      ");
                    isInCorrect = true;
                }
            } while (isInCorrect);
        }
        polDliny = dlina / 2;
        for (i = 0; i < polDliny; i++) {
            peremen = massiv[i];
            massiv[i] = massiv[dlina - i - 1];
            massiv[dlina - i - 1] = peremen;
        }
        for (i = 0; i < dlina; i++) {
            System.out.print(massiv[i]);
            System.out.print(" ");
        }
        scan.close();
    }
}