这样的问题看API就行了。public String readLine() throws IOExceptionReads a line of text. A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed.Returns: A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached Throws: IOException - If an I/O error occurs See Also: Files.readAllLines(java.nio.file.Path, java.nio.charset.Charset) public int read(char[] cbuf) throws IOExceptionReads characters into an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.Parameters: cbuf - Destination buffer Returns: The number of characters read, or -1 if the end of the stream has been reached Throws: IOException - If an I/O error occurs
throws IOExceptionReads a line of text. A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed.Returns:
A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached
Throws:
IOException - If an I/O error occurs
See Also:
Files.readAllLines(java.nio.file.Path, java.nio.charset.Charset)
public int read(char[] cbuf)
throws IOExceptionReads characters into an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.Parameters:
cbuf - Destination buffer
Returns:
The number of characters read, or -1 if the end of the stream has been reached
Throws:
IOException - If an I/O error occurs