java.io.BufferedInputStream.available() 方法返回从输入流中读取不受阻塞,输入流方法的下一次调用的剩余字节数。
声明
以下是java.io.BufferedInputStream.available()方法的声明
public int available()
返回值
此方法返回的字节数保持从此输入流中读取而不阻塞。
异常
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IOException -- -- 如果发生I/O错误.
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public class BufferedInputStreamDemo { public static void main(String[] args) throws Exception { InputStream inStream = null; BufferedInputStream bis = null; try{ // open input stream test.txt for reading purpose. inStream = new FileInputStream("c:/test.txt"); // input stream is converted to buffered input stream bis = new BufferedInputStream(inStream); // read until a single byte is available while( bis.available() > 0 ) { // get the number of bytes available Integer nBytes = bis.available(); System.out.println("Available bytes = " + nBytes ); // read next available character char ch = (char)bis.read(); // print the read character. System.out.println("The character read = " + ch ); } }catch(Exception e){ e.printStackTrace(); }finally{ // releases any system resources associated with the stream if(inStream!=null) inStream.close(); if(bis!=null) bis.close(); } } }