Adding Arrays

[sfsdfd sdfdsfgsdg]

can someone show me or guide me in the right direction. I need to know how to create a method that has parameters of two primitive type arrays that must be added together and then returned in a separate array.

I really appreciate any and all suggestions on how to do this.

[Sebastian Janisch]

Do you have an approach already ?

[Christophe Verré]

Hi, Welcome to the ranch
Don't forget to go through our FAQ, especially this one.

[Sebastian Janisch]

I have the result ready waiting for you, but come up with an approach first ...

[Rob Spoor]

Do you know how to create an array of a specific length? Do you know how to read elements from an array and assign array elements? If you answered "yes" to both questions, then it shouldn't be hard at all.

[Sebastian Janisch]

Rob Prime wrote:Do you know how to create an array of a specific length? Do you know how to read elements from an array and assign array elements? If you answered "yes" to both questions, then it shouldn't be hard at all.

There is however a nice generic approach that is a little trickier for starters.

[sfsdfd sdfdsfgsdg]

yea im pretty new to java.

[sfsdfd sdfdsfgsdg]

public class addingArray {

public static void main(int [] one, int [] two) {


if (one.length > two.length) {
int [] resultArray = new int [one.length];

}
if (one.length > two.length) {
int [] resultArray = new int [two.length];

}

for (int i=0; i<one.length;i++) {
resultArray[i] = one[i] + two[i];

}

System.out.println( resultArray);




}


}

[Sebastian Janisch]

Hey,

please put your code between the code tags to makes things more readable .

I got you wring earlier. I thought you wanted to merge two arrays together returning one array that contains the accumulated array values.

As for your approach, that looks fair. But I think you do not want to call this method public static void main(int [] one, int [] two) ;)

You permit clients to pass two arrays of different lengths in there, is that what you want or should the array sizes match?

In that case you can impose this restriction by validating before you do any computations.

public static int[] sum(int[] array1, int[] array2) {
    if(array1.length != array2.length)
        throw new IllegalArgumentException ("Arrays are of different lengths");

    // do your stuff
}

If you want to take it one step further, you could accept a variable number of arrays coming in.