Complete the method/function so that it converts dash/underscore delimited words into camel casing. The first word within the output should be capitalized only if the original word was capitalized.
解决方法一：
思路：以下划线或中划线拆分字符串，将首字母转换大写之后再拼接。
import java.lang.StringBuilder;
class Solution{
static String toCamelCase(String s){
String[] aa;
String cc="";
String bb;
if(s.contains("-")){
aa= s.split("-");
cc= aa[0];
for(int i = 1;i<aa.length;i++){
bb=aa[i].substring(0,1).toUpperCase()+aa[i].substring(1);
cc=cc+bb;
}
}
else if(s.contains("_")){
aa = s.split("_");
cc = aa[0];
for(int i = 1;i<aa.length;i++){
bb=aa[i].substring(0,1).toUpperCase()+aa[i].substring(1);
cc=cc+bb;
}
}
return cc;
}
}
https://www.codewars.com/kata/517abf86da9663f1d2000003/train/java
