Mix two arrays in one (three in three). Java

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Mix two arrays in one (three in three). Java

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#1 by (1 votes)

1

I need to mix two arrays into one whose lengths we insert and fill with randoms. The question is that I have to mix them in the following way: three first of the first array, three first of the second array, three of the first array, three of the second array ... etc, and my code does not work well, sometimes it exception

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 12 at arrays.Ej_6.main (Ej_6.java:46)

How can I solve it?

package arrays;
import java.util.Scanner;

public class Ej_6 {

public static void main(String[] args) {
    // TODO Auto-generated method stub

    Scanner input=new Scanner (System.in);
    System.out.println("Introduce la dimension del primer array");
    int n=input.nextInt();
    System.out.println("Introduce la dimension del segundo array");
    int d=input.nextInt();

    int[] p_array = new int[n];
    int[] s_array = new int[d];

    for (int i=0;i<p_array.length;i++){
        p_array[i]=(int)(Math.random()*10);
        System.out.print(p_array[i] + " ");
    }
    System.out.println();
    for (int j=0;j<s_array.length;j++){
        s_array[j]=(int)(Math.random()*10);
        System.out.print(s_array[j] + " ");
    }

    System.out.println();

    int[] mezcla = new int [n+d];
    int in_parray=0;
    int in_sarray=0;
    int x=0;

    for (x=0;x<mezcla.length;x++){
        if((x+2)%2==0 && in_parray<p_array.length){
            for (int k=0;k<3;k++){
                mezcla[x]=p_array[in_parray];
                in_parray++;
                x++;
            }
        } 
        System.out.println();
        if ((x+3)!=0 && in_sarray<s_array.length){
            for (int k=0;k<3;k++){
                mezcla[x]=s_array[in_sarray];
                x++;
                in_sarray++;
            }
        }

    }
    for (int z=0;z<mezcla.length;z++){
        System.out.print(mezcla[z] + " ");
    }

}

}

java array

asked by Javi 02.12.2017 в 13:19

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1 answer

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score 1 · Accepted Answer

Here you have it, do not forget that you always have to consider the index you are going to access, your code falls because it does not work with an array of less than 3 elements, check my code:

public static void main(String[] args) {

    Scanner input=new Scanner (System.in);
    System.out.println("Introduce la dimension del primer array");
    int n=input.nextInt();
    System.out.println("Introduce la dimension del segundo array");
    int d=input.nextInt();

    int[] p_array = new int[n];
    int[] s_array = new int[d];

    for (int i=0;i<p_array.length;i++){
        p_array[i]=(int)(Math.random()*10);
        System.out.print(p_array[i] + " ");
    }
    System.out.println();
    for (int j=0;j<s_array.length;j++){
        s_array[j]=(int)(Math.random()*10);
        System.out.print(s_array[j] + " ");
    }

    System.out.println();

    int[] mezcla = new int [n+d];
    int in_parray=0;
    int in_sarray=0;
    int next_value_p = 3;
    int next_value_s = 3;

    for (int x=0;x<mezcla.length;x++){

        if(in_parray >= next_value_p && in_sarray >= next_value_s ){
            next_value_p+=3;
            next_value_s+=3;
        }

        if (in_parray < next_value_p && in_parray < p_array.length){
            mezcla[x] = p_array[in_parray];
            in_parray = in_parray + 1;
        }
        else
        if (in_sarray < next_value_s && in_sarray < s_array.length){
            mezcla[x] = s_array[in_sarray];
            in_sarray = in_sarray + 1;
        } 

    }

    for (int z=0;z<mezcla.length;z++){
        System.out.print(mezcla[z] + " ");
    }           
}