class FileCache {

    private String value;
    private final BufferedReader reader;

    FileCache((BufferedReader reader) {
        this.reader = reader;
    }

    public String getValue() {
        return value;
    }

    public void next() {
        value = reader.readLine();
    }

}

class Main {

    public static void main(String[] args) {
        FileCache[] list = new FileCache()[3]
        ...

    }

}