- /**
- * @author Jane Ullah
- * @purpose Problem 8 - Project Euler
- * @date 12/28/2011
- * @site http://janetalkscode.com
- */
- public class Problem8 {
- public static void main(String[] args) {
- String digits = "73167176531330624919225119674426574742355349194934"
- + "96983520312774506326239578318016984801869478851843"
- + "85861560789112949495459501737958331952853208805511"
- + "12540698747158523863050715693290963295227443043557"
- + "66896648950445244523161731856403098711121722383113"
- + "62229893423380308135336276614282806444486645238749"
- + "30358907296290491560440772390713810515859307960866"
- + "70172427121883998797908792274921901699720888093776"
- + "65727333001053367881220235421809751254540594752243"
- + "52584907711670556013604839586446706324415722155397"
- + "53697817977846174064955149290862569321978468622482"
- + "83972241375657056057490261407972968652414535100474"
- + "82166370484403199890008895243450658541227588666881"
- + "16427171479924442928230863465674813919123162824586"
- + "17866458359124566529476545682848912883142607690042"
- + "24219022671055626321111109370544217506941658960408"
- + "07198403850962455444362981230987879927244284909188"
- + "84580156166097919133875499200524063689912560717606"
- + "05886116467109405077541002256983155200055935729725"
- + "71636269561882670428252483600823257530420752963450";
- int maxProduct = 0, temp = 1;
- for (int i = 0; i < (digits.length()-5); i++) {
- String fiveDigits = digits.substring(i,(i+5));
- temp = parseString(fiveDigits);
- if (temp > maxProduct) {
- maxProduct = temp;
- }
- }
- System.out.println("Max product: " + maxProduct);
- }
- //Method to multiply all 'digits' in a string
- public static int parseString(String digits) {
- int product = 0;
- //Strips out non-word characters
- digits = digits.replaceAll("\\W","");
- for (int i = 0; i < digits.length(); i++){
- product *= Integer.parseInt(digits.substring(i,(i+1)));
- }
- return (digits.length() > 0) ? product:0;
- }
- }