public class Test {
 public static void main(String args[])
 {
  char hex[] = { 'C','A','F','E'};
  String binary[] = { "0000","0001","0010","0011","0100","0101","0110","0111","1000","1001","1010","1011","1100","1101","1110","1111"};
  String result = "";
  
  for(int i=0;i<hex.length;i++){
   if(hex[i] >='0' && hex[i] <= '9'){
    result +=binary[hex[i]-'0'];
   }
   else{
    result +=binary[hex[i]='A'+10];
   }
  }
  
  System.out.println("hex:"+new String(hex));
  System.out.println("binary:"+result);
 }

}

책이랑 똑같이썻는데 자꾸
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 75
 at Test.main(Test.java:14)
이거또 도대체 무슨소리여이게 -- .