java io file

[] args)throwsIOException { - //Encapsulating Data Sources -BufferedReader br =NewBufferedReader (NewFileReader ("B.txt")); - // Encapsulate Destination (Create collection Object) -arraylistNewArraylist(); - in //read data stored in the collection -String line =NULL; to while(line = Br.readline ())! =NULL) { + Array.add (line); - } the * //Freeing Resources $ br.close ();Panax Notoginseng - //iterating through the collection the

created ..."); File.getparentfile (). Mkdirs (); }Else{System.out.println ("Directory exists without creating ..."); } bufferedwriter BW=NewBufferedWriter (NewOutputStreamWriter (NewFileOutputStream (file), "Utf-8")); Bw.write (Sb.tostring ()); Bw.flush (); } Catch(unsupportedencodingexception e) {e.printstacktrace (); } Catch(FileNotFoundException e) {e.printstacktrace (); } Catch(IOException e) {e.printstacktrace (); }

1. Randomly get name cases in a text fileRequirements: I have a text file stored in a few names, please write a program implementation randomly get a person's name.Analysis:A: Storing the data in a text file in a collectionB: Randomly produce an indexC: Gets a value based on the index2. Code implementation:1 Packagecn.itcast_02;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.FileReader;5 Importjava.io.IOE

NIO and IO in the java file system, and nioio in the java File System Java introduced the java NIO mechanism since jdk1.4: The notable features of NIO are channel, buffer, selector ), n

c:map.keyset ()) {Bw.write ("+c+": "+map.get (c) +" X "); Bw.newline (); Bw.flush (); } System.out.println ("Map output succeeded"); } Catch(FileNotFoundException e) {e.printstacktrace (); } Catch(IOException e) {e.printstacktrace (); }finally { Try{bw.close (); Br.close (); } Catch(IOException e) {e.printstacktrace (); } } }}Java Base IO Stream cop

Java IO stream (character stream)File OpenRead fileClose File//Open File//Read File contents//Close FileImportJava.io.*; Public classindex{ Public Static voidMain (string[] args)throwsexception{//Open

1 PackageCom.sxd.test.util;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.BufferedWriter;5 ImportJava.io.File;6 ImportJava.io.FileInputStream;7 ImportJava.io.FileOutputStream;8 Importjava.io.IOException;9 ImportJava.io.InputStreamReader;Ten ImportJava.io.OutputStreamWriter; One A Importorg.junit.Test; - - Public classCreateinsert { the - @Test - Public voidTest ()throwsioexception{ - + //1. Reading files -File

Blog from: http://blog.csdn.net/amosryan/article/details/6568783 Function directory: Convert input stream to byte stream read the file as a string to specify the encoding format to place the input stream into a list Source:[Java] View Plain copy print? packageamosryan.utility.file; importjava.io.bufferedreader; importjava.io.bytearrayoutputstream; importjava.io.file; import java.io.fileinputstream; import

ioexception Normal Create a new file Public Boolean exists () Normal Determine whether a file exists Public Boolean Delete () Normal Delete an object Public Boolean isdirectory () Normal Determines whether the specified path is a directory. Public long length () Normal Size of the returned File

The file IO in Java7 has changed a lot and has introduced many new classes specifically:Import Java.nio.file.DirectoryStream;Import Java.nio.file.FileSystem;Import Java.nio.file.FileSystems;Import Java.nio.file.Files;Import Java.nio.file.Path;Import java.nio.file.Paths;Import Java.nio.file.attribute.FileAttribute;Import java.nio.file.attribute.PosixFilePermission;Import java.nio.file.attribute.PosixFilePerm

[Java iO] _ file class notes Objectives of this chapter: Measure the test taker's knowledge about the functions of the file class.You can use methods in the file class to operate files. File class In the entire

/123.png"); FileOutputStream Fos=NewFileOutputStream ("G:/io Data/1234.png"); byte[]data =New byte[1024x768]; intLen; Try { while(Len=fis.read (data))!=-1) {fos.write (data,0, Len); } fis.close (); Fos.flush (); Fos.close (); System. out. println ("Copy ok!"); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); } } Catch(FileNotFoundException e)

fullFwriter.Close();//Close FileWriter object //Read fileFileReader Freader =NewFileReader (file);Char[] CS2 =New Char[ the]; Freader.Read(CS2);//This is not read by the while loop because it knows the length is not greater than 15 for(CharC:CS2) {//Traversal outputSystem. out.Print(c); } freader.Close();Operation Result:i love javaReference1. Java Stream (stream),

Existing requirements, a designated PPT of the desktop according to the size of 1MB to cut, will cut out the files and configuration files in a directoryImportJava.io.File;ImportJava.io.FileInputStream;Importjava.io.FileNotFoundException;ImportJava.io.FileOutputStream;Importjava.io.IOException;Importjava.util.Properties; Public classTest { Public Static voidMain (string[] args)throwsIOException {File file=N

The use of the file class in the JAVAI/O section of the Java---(note)In Java, I/O (input/output) is a tedious thing, because I do not see the obvious effect, but the input/output is a necessary part of all programs-using the input mechanism, allowing the program to read external data (including data from disk, CD and other storage devices), user input data, using