public class IsrAndOswDemo {

public static void main(String[] args)throws IOException {

FileInputStream in = new FileInputStream("e:\\java\\wenzi.txt");

InputStreamReader isr = new InputStreamReader(in);//默認項目的編碼

int c;

while((c=isr.read())!=-1){

System.out.print(c);

}

}

請問大神，這段代碼里面將int?c改為char?c為什么會報錯，c=isr.read()這里返回的不是char類型的嗎