I know there are many questions to this problem on here but I did all those solutions and it still doesn't work. For some reason it only stores the first input
My Input:
1
2
3
4
Expected Output:
[1.0,2.0,3.0,4.0]
Actual Output:
[1.0]
Code
inputValue = stdin.readLine (); //Reads input
String [] input = inputValue.split ("\\R");
double [] numbers = new double[input.length];
for(int i = 0; i < input.length; i++){
numbers[i] = Double.parseDouble(input[i]);}
The input file contains 4 separate lines.
readline() reads only a single line
You only read and processed one line. This will process all the input into an ArrayList, which you can later convert to an array if you really need to.
List<Double> numbers = new ArrayList<>();
while( (inputValue = stdin.readLine()) != null) {
numbers.add(Double.valueOf(inputValue);
}
readLine() will read line, not the whole input.
Try this:
import java.io.*;
import java.util.ArrayList;
class Sample {
public static void main(String[] args) throws IOException {
String inputValue;
BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
// read the input
ArrayList<String> inputList = new ArrayList<String>(); // Requires JRE >= 1.5
while((inputValue = stdin.readLine ()) != null) //Reads input
inputList.add(inputValue);
// convert what is read to double
double [] numbers = new double[inputList.size()];
for(int i = 0; i < numbers.length; i++){
numbers[i] = Double.parseDouble(inputList.get(i));
}
// print what is read
System.out.print("[");
for(int i =0; i < numbers.length; i++){
if (i > 0) System.out.print(",");
System.out.print(numbers[i]);
}
System.out.println("]");
}
}
Here is Java 8 smart code.
String [] input = ...
double [] numbers= Arrays.stream(input).mapToDouble(Double::valueOf).toArray();
doubleand put it in the array directly. there is no need of extraStringvariable.