Question

java， readLine()怎么用啊

readLine()读取一行，读取什么啊，能举个例子吗

Answer 1

public static void readFileByLines(String fileName) {
File file = new File(fileName);
BufferedReader reader = null;
try {
System.out.println("以行为单位读取文件内容，一次读一行");
reader = new BufferedReader(new FileReader(file));
String tempString = null;
int line = 1;
//一次读一行，读入null时文件结束
while ((tempString = reader.readLine()) != null) {
//把当前行号显示出来
System.out.println("line " + line + ": " + tempString);
line++;
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
}
}
}
}

Answer 2

Scanner sc=new Scanner(System.in);
String str=sc.readLine();//读取一行字符

追问

读的是键盘输入的信息啊？