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java读取文本文件的方法有很多 这个例子主要介绍最简单 最常用的BufferedReader类 完整例子如下 package net chinaunix blog hzm text;import java io BufferedReader;import java io FileReader;import java io IOException;public class ReadFile {private String path;public ReadFile(String filePath){path = filePath;}public String[] openFile() throws IOException{FileReader fr = new FileReader(path) BufferedReader textReader = new BufferedReader(fr) String[] textData = new String[readLines()];int i;for(i= ; i readLines() i++){textData[i] = textReader readLine() }textReader close() return textData;}int readLines() throws IOException{FileReader fileToRead = new FileReader(path) BufferedReader bf = new BufferedReader(fileToRead) int numberOfLines = ;@SuppressWarnings( unused )String oneLine;while((oneLine = bf readLine()) != null){numberOfLines++;}bf close() return numberOfLines;}}package net chinaunix blog hzm text;import java io IOException;public class FileData {public static void main(String[] args) throws IOException{String filePath = C:/text txt ;try{ReadFile reader = new ReadFile(filePath) String[] content = reader openFile() int i;for(i= ;icontent length;i++){System out println(content[i]) }}catch(IOException e){System out println( 异常信息 + e getMessage()) }}}java io BufferedReaderThe buffer size may be specified or the default size may be used The default is large enough for most purposes In general each read request made of a Reader causes a corresponding read request to be made of the underlying character or byte stream It is therefore advisable to wrap a BufferedReader around any Reader whose read() operations may be costly such as FileReaders and InputStreamReaders For example BufferedReader in = new BufferedReader(new FileReader( foo in )) will buffer the input from the specified file Without buffering each invocation of read() or readLine() could cause bytes to be read from the file converted into characters and then returned which can be very inefficient Programs that use DataInputStreams for textual input can be localized by replacing each DataInputStream with an appropriate BufferedReader java io FileReaderFileReader is meant for reading streams of characters For reading streams of raw bytes consider using a FileInputStream lishixinzhi/Article/program/Java/hx/201311/26249
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由java编译器把源文件编译成虚拟机可以识别的二进制代码称为字节码。
而字节码是由java解释器去解释执行的。
1、8086机器码长度不一样,JAVA代码为每种基本指令类型给一个编码格式。
2、对照格式填上不同数字表示不同的寻址方式,数据类型,便可求得每条指令的机器码。
3、8086指令采用变长指令,指令长度可有1-6个字节组成。
不太明白你的意思,你的问题好像没有说清楚,
如果是为了在JavaScript中检测恶意代码:br /,可以使用正则表达式进行验证