int read boolean markSupported int read(char cbuf, int off, int len) 描述 java.io.BufferedReader.read() 方法从这种缓冲读取器单个字符 声明 以下是java.io.BufferedReader.read()方法的声明。 public int read() 参数 NA 返回值 该方法将字符作为整数返回。如果已到达流的末尾,则该方法返回-1。 异常 IOException − 如果发生I / O错误 实例 以下示例显示了java.io.BufferedReader.read()方法的用法。 package com.tutorialspoint; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.InputStream; import java.io.InputStreamReader; public class BufferedReaderDemo { public static void main(String[] args) throws Exception { InputStream is = null; InputStreamReader isr = null; BufferedReader br = null; try { // open input stream test.txt for reading purpose. is = new FileInputStream("c:/test.txt"); // create new input stream reader isr = new InputStreamReader(is); // create new buffered reader br = new BufferedReader(isr); int value = 0; // reads to the end of the stream while((value = br.read()) != -1) { // converts int to character char c = (char)value; // prints character System.out.println(c); } } catch(Exception e) { e.printStackTrace(); } finally { // releases resources associated with the streams if(is!=null) is.close(); if(isr!=null) isr.close(); if(br!=null) br.close(); } } } 假设我们有一个文本文件c:/test.txt,它具有以下内容。此文件将用作示例程序的输入 ABCDE 让我们编译并运行上面的程序,这将产生以下结果 A B C D E boolean markSupported int read(char cbuf, int off, int len)