public class FISRead { public static void main(String[] args) throws IOException{ // 使用文件名称创建流对象 FileInputStream fis = new FileInputStream("read.txt"); // 读取数据,返回一个字节 int read = fis.read(); System.out.println((char) read); read = fis.read(); System.out.println...
public int read(): 从输入流读取一个字符。 public int read(char[] cbuf): 从输入流中读取一些字符,并将它们存储到字符数组 cbuf中 。 3.2 FileReader类 java.io.FileReader类是读取字符文件的便利类。构造时使用系统默认的字符编码和默认字节缓冲区。 小贴士: 字符编码:字节与字符的对应规则。Windows系统的中...
安装完成后,JDK默认到目录C:\Program Files\Java\下,此目录下读者可以发现一个一个jdk目录和一个jre目录,如图1.8所示。 图1.8 JDK和JRE 打开jdk目录,如图1.9所示。 图1.9 JDK目录结构 JDK9的目录与之前JDK8发生了一些变化。 bin目录:bin是二进制binary缩写,表示编译后的二进制可执行文件;JDK的bin目录下...
需创建BufferedReader对象并关联输入源,如InputStreamReader。BufferedReader的readLine()方法逐行读取输入。读取结束时readLine()会返回null作为结束标志。相比Scanner,BufferedReader在处理大文本时效率更高。Console类提供读取密码等特殊输入功能。System.console()可获取Console对象。Console的readPassword()用于安全读取密码输入...
read(byte b[]) 封装了 read(byte b[], int off, int len) 1. 关于InputStream.read() 在从数据流里读取数据时,为图简单,经常用InputStream.read()方法。这个方法是从流里每次只读取读取一个字节,效率会非常低。 更好的方法是用InputStream.read(byte[] b)或者InputStream.read(byte[] b,int off,in...
所以堆空间还可以细分为新生代和老生代,再具体一点可以分为Eden、Survivor(又可分为From Survivor和To Survivor)、Tenured;方法区和堆都是各个线程共享的内存区域,用于存储已经被JVM加载的类信息、常量、静态变量、JIT编译器编译后的代码等数据;程序中的字面量(literal)如直接书写的100、"hello"和常量都是放在常量池...
Apache Any23 Anything To Triples (Any23) is a library, a web service and a command line tool that extracts structured data in RDF format from a variety of Web. License: Apache 2. Apache Forrest Apache Forrest software is a publishing framework that transforms input from various sources into...
Reads up to len bytes of data from the input stream into an array of bytes.Read() Reads the next byte of data from the input stream. C# 复制 [Android.Runtime.Register("read", "()I", "GetReadHandler")] public abstract int Read (); Returns Int32 the next byte of data, or ...
However, the basics are much the same as they are in this program: Open a socket. Open an input stream and output stream to the socket. Read from and write to the stream according to the server's protocol. Close the streams. Close the socket. Only step 3 differs from client to ...
Besides using the Scanner class, we can also use an InputStreamReader with System.in to get the input from the console: BufferedReader buffReader = new BufferedReader(new InputStreamReader(System.in)); And then we can read input and parse it to an integer: int i = Integer.parse...