Question

In main, assign 2 random numbers (ints between 3 and 10) for the first dimension and the second dimension

I had this but the Math.random() method doesn;t work

import java.lang.Math;


public class Homework2 {
public static void main(String[] args){

    double doubMatrix1[][] = (int) (Math.random()*(10-3+1)+3);
    double doubMatrix2[][];
    double doubMatrix3[][];


}
}

Answer 1

The problem in your code is that you are trying to initialize a matrix of double with an int

Types must be equals!

Here are your code fixed.

import java.lang.Math;

public class Homework2 {
public static void main(String[] args){

    int d1 = (int) (Math.random()*(10-3+1)+3);
    int d2 = (int) (Math.random()*(10-3+1)+3);

    double doubMatrix1[][] = new double[d1][d2];
    double doubMatrix2[][];
    double doubMatrix3[][];


}
}

hope this help