BufferedReader class in Java
Construction method:
1: public BufferedReader(Reader in,int sz )
1. Buffer character input stream with specified size input buffer;
2. in a Reader;
3. sz input buffer The size of the area.
2: public BufferedReader(Reader in)
1. Use the buffered character input stream of the default size input buffer.
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Commonly used methods:
public int read() throws IOException
Read a single character as an integer (range 0 to 65535 (0x00-0xffff)). If it reaches the end of the stream, -1 is returned.
public int read(char[] cbuf) throws IOException
Read one byte array cbuf at a time - the number of characters read from the target buffer, if it has been reached At the end of the stream, returns -1
public void close() throws IOException
Closes the stream and releases all resources associated with it.
Special usage:
public String readLine() throws IOException
1. Read a text line
2. One of the following characters can be considered to have terminated a line: line feed ('\n'), carriage return ('\r') or carriage return followed by a line feed.
3. If the end of the stream has been reached, return null
Sample code:
import java.io.BufferedReader; import java.io.FileReader; public class class1 { public static void main(String[] args) throws Exception { //创建字符缓冲输入流对象 BufferedReader br = new BufferedReader(new FileReader("D:/1.txt")); //读数据 //一次读取一个字符数组 char[] chs = new char[1024] ; int len = 0 ; while((len=br.read(chs))!=-1) { System.out.println(new String(chs,0,len)); } //释放资源 br.close(); } }
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