摘要：
importjava.io.*;classFileTree{/*以树形结构列举出指定目录下的文件与文件夹*/publicstaticvoidmain(String[]args)throwsIOException{BufferedReaderbr=newBufferedReader(newInputStreamReader(System.in));System.out.println("请键入您要查看的路径：");Stringpath=br.readLine();if(null!=path){printFiles(newFile(path).listFiles(),0);}} 阅读全文
摘要：
importjava.io.*;importjava.util.*;classPrintPropertiesToStreamDemo{publicstaticvoidmain(String[]args)throwsIOException{Propertiesps=System.getProperties();//打印到标准输出设置ps.list(System.out);//通过流打印到文件ps.list(newPrintStream(newFile("sysinfo.txt")));}} 阅读全文
摘要：
importjava.io.*;importjava.text.*;importjava.util.*;classExceptionInfo{publicstaticvoidmain(String[]args){try{int[]array=newint[2];System.out.println(array[3]);}catch(Exceptione){try{System.setOut(newPrintStream(newFile("err.txt")));Stringdate=newSimpleDateFormat("yyyy-MM-ddHH:mm:ss:S 阅读全文
摘要：
importjava.io.*;classSystemInDemo{/*以键盘录入与屏幕输出为例*/publicstaticvoidmain(String[]args)throwsIOException{//改变标准输入与输出设备实例文件复制操作System.setIn(newFileInputStream(newFile("BufferedCopyFileDemo.java")));System.setOut(newPrintStream(newFile("hah.txt")));//字节流->字符流//字符流->字节流BufferedRe 阅读全文
摘要：
importjava.io.*;/*自定义缓冲区*/classMyBufferedInputStreamDemo{publicstaticvoidmain(String[]args)throwsIOException{MyBufferedInputStreammis=newMyBufferedInputStream(newFileInputStream(newFile("001.avi")));BufferedOutputStreambos=newBufferedOutputStream(newFileOutputStream(newFile("001-1.avi 阅读全文
摘要：
importjava.io.*;classBufferedCopyFileDemo{publicstaticvoidmain(String[]args)throwsIOException{BufferedInputStreambis=null;BufferedOutputStreambos=null;try{bis=newBufferedInputStream(newFileInputStream(newFile("001.avi")));bos=newBufferedOutputStream(newFileOutputStream(newFile("001-1. 阅读全文
摘要：
importjava.io.*;classImageCopyDemo{publicstaticvoidmain(String[]args){FileInputStreamfis=null;FileOutputStreamfos=null;try{fis=newFileInputStream(newFile("001.png"));fos=newFileOutputStream(newFile("001-copy.png"));/*byte[]buffer=newbyte[fis.available()];fis.read(buffer);fos.writ 阅读全文
摘要：
importjava.io.*;importjava.text.*;importjava.util.*;classFileOutputStreamDemo{publicstaticvoidmain(String[]args)throwsIOException{writeFile(newSimpleDateFormat("yyyy-MM-ddHH:mm:ss:SE").format(newDate()));readFile_1();}//小文件便捷读取方式，大文件禁用publicstaticvoidreadFile_3()throwsIOException{FileInput 阅读全文
摘要：
importjava.io.*;classMyReaderLineNumberDemo{publicstaticvoidmain(String[]args){MyReaderForLineNumbermrln=null;try{mrln=newMyReaderForLineNumber("MyReaderLineNumberDemo.java");Stringline=null;mrln.setStartLineNumber(1);mrln.setEndLineNumber(-1);while((line=mrln.readLine())!=null){System.out 阅读全文