java arrays

how do you write the code for multipliying 2 double arrays to be in a 3rd double array? here is my code:

package employeepay;

/** * * @author Owner */ public class Main {

/**
 * @param args the command line arguments
 */

public static void main(String[] args) { double[] values; values = getArray(); for (double num : values) System.out.print(num + " "); double[] values1; values1 = getArray1(); for (double num : values1) System.out.print(num + " "); double[] values2; values2 = getArray2(); for (double num : values2) System.out.print(num + " "); } /** getArray method @return A reference to an array of doubles. */ public static double[] getArray() { double[] array = { 1.2, 2.3, 4.5, 6.7, 8.9 }; return array; } /** getArray1 method @return A reference to an array of doubles. */ public static double[] getArray1() { double[] array1 = { 1.1, 2.2, 3.3, 4.4, 5.5 }; return array1; } /** getArray2 method @return A reference to an array of doubles. */ public static double[] getArray2(double[]array, double[]array1) { double[]array2 = (array[index] * array1[index]); return array2; } } the lines with double asterisks in front and back are the error lines thank you.

View Answers

November 19, 2010 at 12:59 PM

Hi Friend,

We have modified your code:

public class MultiplyTwoArrays{
public static void main(String[] args) { 
    double[] values = getArray(); 
    for (double num : values) 
    System.out.println(num + " ");
    System.out.println();
    double[] values1 = getArray1(); 
    for (double num : values1) 
    System.out.println(num + " ");
        System.out.println();
    double[] values2 = getArray2(values,values1); 
    for (double num : values2)
    System.out.println(num + " ");
    } 
public static double[] getArray() { 
    double[] array = { 1, 2, 4, 6, 8 };
    return array; } 
    public static double[] getArray1() { 
        double[] array1 = { 1, 2, 3, 4, 5 };
        return array1; 
        } 
public static double[] getArray2(double[]array, double[]array1) {
    double[]array2=new double[array.length] ;
    for(int i=0;i<array2.length;i++){
    array2[i] = array[i] * array1[i]; 
    }
    return array2; 
    } 
    }

You can use simple code also:

public class MultiplyTwoArrays{
    public static void main(String[] args) { 
    double[] array1 = { 1.2, 2.3, 4.5, 6.7, 8.9};
    double[] array2 = { 1.1, 2.2, 3.3, 4.4, 5.5};
    double []array=new double[array1.length];
    for(int i=0;i<array.length;i++){
        array[i]=array1[i]*array2[i];
    }
    for(int i=0;i<array.length;i++){
        System.out.println(array[i]);
    }

    } 
    }

Thanks