Reader

Reader类是java.io.InputStream类的镜像。

public abstract class Reader{
    protected Reader(){}
    protected Reader(Object lock){}
    public abstract int read(char[] text,int offset,int length) throws IOException;
    public int read() throws IOException{}
    public int read(char[] text) throws IOException{}
    public long skip(long n) throws IOException{}
    public boolean ready(){}
    public boolean markSupported(){}
    public void mark(int readAheadLimit) throws IOException{}
    public void reset() throws IOException{}
    public abstract void close() throws IOException{}
    

}

read()方法将一个Unicode字符作为一个int返回，可以是0到65535之间的一个值，或者在流结束时返回-1。

 

InputStreamReader是Reader的最重要的子类。

InputStreamReader从其底层输入流（如FileInputStream或TelnetInputStream）中读取字节。它根据指定的编码方式将这些字节转化为字符，并返回这些字符。

public InputStreamReader(InputStream in){}

public InputStreamReader(InputStream in,String encoding) throws UnsupportedEncodingException{}