Java - Arrelos en java

package tar;

import java.util.Scanner;

public class Tar {

    public static void main(String[] args) {

        int n;

        Scanner in = new Scanner(System.in);

       System.out.println("¿Cuántos numeros? ");

       n=in.nextInt();

       double[] array = new double[n];

       for (int i=0;i<n;i++){

       System.out.println((i+1+": "));

       array[i]=in.nextDouble();

       }

       String a="los nùmeros son: ";

       String b="Suma: ";

       for (int i=0;i<n;i++){

       a=a+ array[i]+" ";

       }

        System.out.println(a);

        for (int i=1;i<=(n/2)+n%2;i++){

       b=b+ (array[i-1]+array[n-i])+" ";

       }

        System.out.println(b);

    }

}

import java.util.Random;

import java.util.Scanner;

public class Matriz5x5 {

    public static void main(String[] args) {

       int n,s=0;

       Scanner in = new Scanner(System.in);

       System.out.print("Cantidad de numeros:");

       n=in.nextInt();

       int  numeros[] = new int[n];

       for (int x=0;x<n;x++){

       System.out.print("Ingresenumero "+(x+1)+":");

       numeros[x]=in.nextInt();

       }

       System.out.println("Los numeros ingresados son:");

       for (int i=0;i<n;i++){

       System.out.print(numeros[i]+" ");

       }

       System.out.println("\nLa suma es:");

       if(n%2==0){

           for (int x=0,y=n-1;x<n/2;x++,y--){

              s= numeros[x]+numeros[y];

              System.out.print(s+" ");

               }

            }

       else {

          for (int x=0,y=n-1;x<(n/2+1);x++,y--){

              if(x==y){

              s= numeros[x];

              }

              else{

                  s= numeros[x]+numeros[y];

              }

              System.out.print(s+" ");

             }

       }

       System.out.println();

 }

}