how to write data in file in java

system code//code = System.getproperty ("file.encoding"); Code = "GBK"; ISR = new InputStreamReader (new FileInputStream (file), code); Read the contents of the file int length =-1; char[] buffer = new char[1024]; StringBuffer sb = new StringBuffer (); while (length = isr.read (buffer, 0, 1024))!=-1) {sb.append (buffer,0,length);

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.IO;namespacetwo-dimensional array {classProgram {Static voidMain (string[] args) { introw =0;//Line intCol =0;//LieFileStream FS; stringPath =@"C:\Documents and settings\administrator\ desktop \1.txt"; FS=NewFileStream (Path, FileMode.Open, FileAccess.Read); StreamReader SR; SR=NewStreamReader (FS); ListDouble[]> arrary =NewlistDouble[]>(); while(!Sr. Endofstream) {string[]

second parameter in the constructor true indicates that the file is written in append formFileWriter writer =NewFileWriter (FileName,true); Writer.write (content); Writer.close (); } Catch(IOException e) {e.printstacktrace (); } } Public Static voidMain (string[] args) {String fileName= "C:/temp/newtemp.txt"; String content= "New append!"; //append files by method aAppendtofile.appendmethoda (fileName, content); Appendtofile.appendmethoda (F

There are several methods for reading and writing files in Java, but I think the simplest is the fileinputstream and fileoutputstream classes. For example, Code : Package jmyang. file; import Java. io. *; public class filetest {/** delete file */public static Boolean Delete (string filename) {boolean result = false;

1. Obtain information entered by the console userPublic String getinputmessage () throws ioexception ...{System. Out. println ("Enter your command ");Byte buffer [] = new byte [1024];Int COUNT = system. In. Read (buffer );Char [] CH = new char [count-2]; // the last two digits are the Terminator, delete notFor (INT I = 0; I Ch [I] = (char) buffer [I];String STR = new string (CH );Return STR;}The user input information can be returned. The disadvantage is that Chinese input is not supported and f

Clear,clcnt=735;ny=73; %2.5*2.5 Lattice Point ofnx=144; %2.5*2.5 Lattice Point ofF=NETCDF (' air.mon.mean.nc ', ' nowrite ');tt=f{' air '} (:);Close (f)Fid=fopen (' a5.grd ', ' W ');For It=1:ntFor J=1:nyFor I=1:nxCount= fwrite (Fid,tt (it,j,i), ' float '),% according to example here with raw dataEndEndEndFclose (FID)A5.GRD the corresponding CTL file isDset F:\A5.GRDTitle Monthly mean air temperature NCEP reanalysisOptions Sequential YrevUndef-9.96921e

// Ini configuration file path# Define GOODSCATEGORYENGINE_FILE _ T ("C: \ ClientDirEda ")# Define GOODSCATEGORYENGINE_INI _ T ("C: \ ClientDirEda \ StartX. ini ") # Define GOODSCATEGORYENGINE_INI_TEST _ T ("C: \ ClientDirEda \ GoodsCategoryEngine. ini ") CString str = _ T ("I have successfully read the ini configuration file! "), StartXStr;Int fileSize1, fileSize2;// Read the INI FileFileSize1 = GetPri

Java Simple file read and write, yesterday helped students write a simple file processing program, record this side, unexpectedly spent one hours, is because System.out print log when the location of the wrong:-(public static void Main (string[] args) {try{BufferedReader br

Io flow simply means that the input stream and output stream are primarily used to process data transfer between devicesCase 1 is a byte stream, Case 2 is a character stream, the difference between the byte stream and the character stream is very large, and the reader needs to use it according to his own scene.Case 1:Use byte stream and package stream (readers can understand the packaging flow, mainly using the adorner mode) to read and

Java compares IO and NIO file read/write performance tests, ionio Original article: test the file read/write performance of IO and NIO in java Source code: http://www.zuidaima.com/share/1550463508466688.htm 1. NIO adopts a me

, double-precision and other data. */publicvoidreadmethod1 () {stringfilename= "C:/kuka1.dat"; intsum=0;try{ DatainputstreaMin=newdatainputstream (newbufferedinputstream (new FileInputStream (FileName)); Sum+=in.readint (); Sum+=in.readint (); Sum+=in.readint (); System.out.println ("Thesumis:" +sum); In.close ();} catch (exceptione) {e.printstacktrace ();}} Publicvoidreadmethod2 () {Try{fileinputstreamstream=newfileinputstream ("C:/kuka.dat"); Intc;w

Java write local orc file (Hive2 API) Hive2.0 later, a new API was used to read and write orc files (https://orc.apache.org).The code in this article generates the Orc file locally using a Java program, and then loads it into the

#include Debugging16th. Write data to TXT file (c + +)

of dataIRow row = sheet. CreateRow (r + 1);Row. Createcell (0). Setcellvalue ((int) dt. rows[r]["Id"]);Row. Createcell (1). Setcellvalue (dt. rows[r]["Name"]. ToString ());Row. Createcell (2). Setcellvalue (dt. rows[r]["Remarks"]. ToString ());}SqlDataReader reader = sqlhelper.executereader (SQL);if (reader. HasRows)//{Create a workbookIworkbook workbook = new Hssfworkbook ();Create a worksheetIsheet sheet = workbook. Createsheet ("Dbtoexcel");int rowIndex = 0;while (reader. Read ())// {A row i

, the load data local parameters should be removed, and the file name should be the full absolute path name. finally attached LOAD DATA infile Syntax LOAD DATA [Low_priority | CONCURRENT] [LOCAL] INFILE ' file_name.txt ' [REPLACE | IGNORE] into TABLE tbl_name [Fields [ TERMINATED by ' string ') [[optionally] en

1. Overview of Bufferedoutputstream/bufferedinputstream (byte buffer stream)It is really much faster to define an array than it was to read one byte at a time, so it seems that a buffer is still very good. Since this is the case, then, when Java began to design, it also took into account this problem, it is specifically provided with a buffer byte class. This class is called: Buffer Class (High efficiency Class)