how to read log file in java code

Java InputStream are widely used when performing IO, such as datainputstream.readint and so on. In fact, these highly encapsulated interfaces are incredibly slow. I have a project startup need to read about 90MB dictionary files, with DataInputStream time consuming more than 3 seconds, swap with Java.nio Packet direct operation memory byte, can accelerate to 300ms around, a full speed 10 times times! Of cou

(")"));//Intercept to a numberI=integer.parseint (NUMSTR);//To calculate the number of the interceptionNewstr=i.tostring (); S=s.replaceall (Numstr, NEWSTR);//Replace the original number with the calculated numberResult.append (System.getproperty ("line.separator") +s); Sc.write (System.getproperty ("Line.separator") +s); } Else{result.append (System.getproperty ("Line.separator") +s); Sc.write (System.getproperty ("Line.separator") +s); }} br.close (); Sc.close

When reading a file in Java code, it is sometimes important to keep the file in its original format (mainly to keep line wrapping). The implementation of the code is fairly straightforward.private static void ReadFile () {StringBuilder sb = new StringBuilder (); String data;

The question about how to read and write TXT files in Java is often asked during the interview. Do not understand or be unfamiliar with the comrades, but remember it! Let's take a look at the specific implementation! Package common; Import java. Io .*; Import java. util. arraylist; Public class iotest { Public static v

Java reads CSV file code /**/ Import Java.io.bufferedreader;Import Java.io.bufferedwriter;Import Java.io.file;Import Java.io.filereader;Import Java.io.filewriter;Import java.io.ioexception;Import Java.text.simpledateformat;Import java.util.arraylist;Import Java.util.date;Import java.util.list;Import Java.util.stringtokenizer;Import Java.util.logging.filehan

colorG.clearrect (0, 0, 139, 139);G.setcolor (Color.Black); Barcode Colorif (bstr.length > 0 bstr.length Boolean[][] B = Qrcode.calqrcode (BSTR);for (int i = 0; i for (int j = 0; J if (B[j][i]) {G.fillrect (J * 3 + 2, I * 3 + 2, 3, 3);}}}}G.dispose ();Bi.flush ();String FilePath = "d:/images/" +param.substring (0,5) + ". jpg";File F = new file (FilePath);Imageio.write (BI, "JPG", f);}public static void Ma

The Java Read Properties configuration file code is as follows: String Path = System.getproperty ("User.dir") + "\\properties\\config.properties"; Properties Pro = new properties (); FileInputStream in = new FileInputStream (path); Pro.load (in); System.out.println (Pro.getproperty ("DriverPath")); System.

Thank http://www.cnblogs.com/lovebread/archive/2009/11/23/1609122.html public class ReadFromFile {/*** Read files in bytes, often used to read binary files, such as pictures, sounds, images, and other files.*/public static void Readfilebybytes (String fileName) {File File = new fi