I'm sorry if this comes through as a "noob" question, but I'm really stuck and I couldn't find any help, no matter where I looked.
The problem I'm having is this:
The user fills out a textbox saying how many numbers (doubles) he is going to input next (say n)
I store that number inside the OnClickListener method (that works ok)
public double n;
//CODE
n = Integer.parseInt(input.getText().toString());
I then need to store the n numbers that the user will input
He will fill out the textbox, press enter and the number should be stored in an array
Something like:
int i = n;
double x[] = new double[n];
button1.onClick(View view){
x[i] = Double.parseDouble(input.getText().toString());
i--;
}
No matter how I declare the x[i] I get an error message. I've done some debugging and the error pops up whenever storring in the array occurs. I know I'm missed out something basic about this and I feel pretty dumb for getting stuck with this, but I'd really appreciate any help or suggestion you guys might have.
Thanks a lot, Eugene
PS I have to declare the array AFTER "n" has been inputted, however when I try to use it in the next OnClickListener, it can't access it unless it's declared final, or as a class variable (public/private etc.)
double x[] = new double[n];
should be double[] x = new double[n];
Example:
public static void main(String[] args) {
int n = 10;
double[] x = new double[n];
x[5] = 7;
x[1] = 31;
for(double i: x) {
System.out.println(i);
}
}
Edit: You need to call i--;
before x[i] = Double.parseDouble(input.getText().toString());
if you call new double[10]
then only x[0]
through x[9]
are valid pointers.
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