int s;
int n = 50;　//改良中
int a[] = new int[n];
int A[][] = new int[n][2];
try {
BufferedReader br = new BufferedReader(new FileReader("ファイル.txt"));
for(int i=0; i<n; i++){
s = br.read();
System.out.print((char)s);
a[i] = s;
}
for(int i=0; i<n; i++){
int k = 0;
int ii;
for(ii = 0; ii < n; ii++){
if(A[ii][0] == 0) break;
if(a[i]==a[ii]){
A[ii][1] += 1;
k = 1;
break;
}
}