获取BufferedReader中read()返回的字符

Question

我怎么可以转换返回一个整数read()的BufferedReader实际字符值,然后将其添加到一个字符串？将read()返回一个代表字读整数.当我这样做时,它不会将实际字符附加到String中.相反,它将整数表示本身附加到String.

int c;
String result = "";

while ((c = bufferedReader.read()) != -1) {
    //Since c is an integer, how can I get the value read by incoming.read() from here?
    response += c;   //This appends the integer read from incoming.read() to the String. I wanted the character read, not the integer representation
}

我该怎么做才能读取实际数据？

Answer 1

刚刚投c了一个char.

另外,不要使用过+=一个String在一个循环.它是O(n ^ 2),而不是预期的O(n).使用StringBuilder或StringBuffer代替.

int c;
StringBuilder response= new StringBuilder();

while ((c = bufferedReader.read()) != -1) {
    // Since c is an integer, cast it to a char.
    // If c isn't -1, it will be in the correct range of char.
    response.append( (char)c ) ;  
}
String result = response.toString();

Answer 2

你也可以将它读入char缓冲区

char[] buff = new char[1024];
int read;
StringBuilder response= new StringBuilder();
while((read = bufferedReader.read(buff)) != -1) {

    response.append( buff,0,read ) ;  
}

这比读取char char更有效