读入字符串，遇到某一字符结束读入

/** * 读入字符串，遇到某一字符结束读入 * int.txt: 中国123美国abc日本;123 */import java.io.*;class Test{public static void main(String[] args) throws IOException{FileReader in = new FileReader("in.txt");int c;StringBuffer sb = new StringBuffer();c = in.read();while( (c != ';') && (c != -1) ){sb.append((char)c);c = in.read();}System.out.println(sb);in.close();}}