int read boolean markSupported int read(char cbuf, int off, int len) 描述 所述java.io.FilterReader.mark(INT readAheadLimit)方法读取单个字符和返回如在范围为0〜65535的整数。 声明 以下是java.io.FilterReader.read()方法的声明 public int read() 参数 NA 返回值 此方法返回字符读取,如0到65535之间的整数,如果到达流的末尾,则返回-1。 异常 IOException - 如果发生I / O错误。 实例 以下示例显示了java.io.FilterReader.read()方法的用法。 package com.tutorialspoint; import java.io.FilterReader; import java.io.Reader; import java.io.StringReader; public class FilterReaderDemo { public static void main(String[] args) throws Exception { FilterReader fr = null; Reader r = null; int i = 0; char c; try { // create new reader r = new StringReader("ABCDEF"); // create new filter reader fr = new FilterReader(r) { }; // read till the end of the stream while((i = fr.read())!=-1) { // converts integer to character c = (char)i; // print System.out.println("Character read: "+c); } } catch(Exception e) { // if any I/O error occurs e.printStackTrace(); } finally { // releases system resources associated with this stream if(r!=null) r.close(); if(fr!=null) fr.close(); } } } 让我们编译并运行上面的程序,这将产生以下结果 Character read: A Character read: B Character read: C Character read: D Character read: E Character read: F boolean markSupported int read(char cbuf, int off, int len)