Read Phone Number

This is the first question of Google of Greater China Test for New Grads of 2014 Round A. Question: read Phone NumberSample Input 315012233444 3-4-415012233444 3-3-512223 2-3 Output Case #1: one five zero one double two three triple fourCase #2: one five zero one double two double three triple fourCase #3: one two double two three is very simple. Split the string according to the format, for example, 3-4-4, split 15012233444 into three strings: 3444, and scan each string from the beginning to the end to record consecutive characters of the same character. Number, then read according to the rules given by the question, and finally splice the parts together.

package rounda;    import java.util.Scanner;    public class Problem1 {             public void output(int caseNo,  String res){          System.out.println("Case #"+caseNo+": "+res);                 }      public String solve(String number,String formator){          String[] form = formator.split("-");          int beginIndex=0;          String res = "";          for(int i=0;i<form.length;i++){              int n = Integer.parseInt(form[i]);              String part = number.substring(beginIndex, beginIndex+n);                            res+=readPart(part)+" ";              beginIndex +=n;                        }          return res.trim();      }      public String readPart(String number){          int continuous=1;          char last = number.charAt(0);          String res="";          for(int i=1;i<number.length();i++){              if(number.charAt(i) == last){                  continuous++;                  continue;              }else{                  res+=readContinuous(continuous,last);                  last = number.charAt(i);                  continuous = 1;              }                            }          res+=readContinuous(continuous,last);          return res.trim();      }      public String readContinuous(int continuous,char last){          String res ="";          switch(continuous){          case 1:              res+=charToName(last)+" ";              break;          case 2:              res+="double "+charToName(last)+" ";              break;          case 3:              res+="triple "+charToName(last)+" ";              break;          case 4:              res+="quadruple "+charToName(last)+" ";              break;          case 5:              res+="quintuple "+charToName(last)+" ";              break;          case 6:              res+="sextuple "+charToName(last)+" ";              break;          case 7:              res+="septuple "+charToName(last)+" ";              break;          case 8:              res+="octuple "+charToName(last)+" ";              break;          case 9:              res+="nonuple "+charToName(last)+" ";              break;          case 10:              res+="decuple "+charToName(last)+" ";              break;          default:              for(int k=0;k<continuous;k++)                  res+=charToName(last)+" ";              break;          }          return res;      }      public String charToName(char c){          int n = c-'0';          String res = "";          switch(n){          case 0:              res = "zero";              break;          case 1:              res = "one";              break;          case 2:              res = "two";              break;          case 3:              res = "three";              break;          case 4:              res = "four";              break;          case 5:              res = "five";              break;          case 6:              res = "six";              break;          case 7:              res = "seven";              break;          case 8:              res = "eight";              break;          case 9:              res = "nine";              break;          }          return res;      }      public static void main(String[] args) {          Scanner scanner;          Problem1 p = new Problem1();                 scanner = new Scanner(System.in);              int T = scanner.nextInt();              int count=T;              while(count-->0){                  String number = scanner.next();                  String formator = scanner.next();                  String result = p.solve(number,formator);                  p.output(T-count,   result);              }      }        }