string - How to extract polynomial coefficients in Java?

Question

Taking the string -2x^2+3x^1+6 as an example, how how to extract -2, 3 and 6 from this equation stored in the string?

Answer 1

Not giving the exact answer but some hints:

• Use replace meyhod:

  replace all - with +-.

• Use split method:

  // after replace effect
  String str = "+-2x^2+3x^1+6"
  String[] arr = str.split("+");
  // arr will contain: {-2x^2, 3x^1, 6}
  

• Now, each index value can be splitted individually:

  String str2 = arr[0];
  // str2 = -2x^2;
  // split with x and get vale at index 0