This example illustrates how to copy contents from one file to another file. This topic is related to the I/O (input/output) of

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1 Java Frameworks Databases Technology Development Build/Test tools OS Servers PHP Books More What's New? Core Java JSP Servlets XML EJB JEE5 Web Services J2ME Glossary Questions? Software Development Search Search Ads by Google Java Programming Java Source Code Java Jobs Java Swing EJB Managed Hosting EJB / Java / J2EE / JBoss on VPS 24x7 Support from Java Experts Java Database High Scalability, High Availability Large Data Sets, High Performance In this section, you will learn how to copy contents from one file to another file. Java Calendar Component migcalendar.com Java Developer - Add a Best Selling Calendar View to your Application Generation of Source Code Java, C++, XSD, DDL, PHP, CORBA, Python & more. Free Trial! DNA copy number analysis Cross-platform array CGH software for Cytogenetic laboratories This example illustrates how to copy contents from one file to another file. This topic is related to the I/O (input/output) of java.io package. In this example we are using File class of java.io package. The File class is an abstract representation of file and directory Java Swing Components pathnames. This class is an abstract, Your source of custom java swing components. system-independent view of hierarchical two components: pathnames. An abstract pathname has 1. An optional system-dependent prefix string, such as a disk-drive specifier, "/" for the UNIX root directory, or "\\" for a Win32 UNC pathname, and 2. A sequence of zero or more string names. Explanation This program copies one file to another file. We will be declaring a function called copyfile which copies the contents from one specified file to another specified file. copyfile(string srfile, String dtfile) The function copyfile(string srfile, String dtfile) takes both file name as parameter. The function creates a new File instance for the file name passed as parameter File f1 = new File(srFile); File f2 = new File(dtFile); and creates another InputStream instance for the input object and OutputStream instance for the output object passed as parameter InputStream in = new FileInputStream(f1); OutputStream out = new FileOutputStream(f2); and then create a byte type buffer for buffering the contents of one file and write to another Tell A Friend Your Friend Name OK Programming Spring Framework Hibernate- Ajax Core Java Database- Enterprise Java iphone J2ME- Java- JavaScript JDBC- JMS- JPA JSP- Open Source PHP Servlets- Struts- Technology UML- Web-Services- XML More... roseindia.net/java/ /CopyFile.shtml 1/5

2 9/6/2010 and then create a byte type buffer for buffering the contents Java Copy of one File file and Example, write to Copy another File in Java specified file from the first one specified file. // For creating a byte type buffer byte[] buf = new byte[1024]; // For writing to another specified file from buffer buf out.write(buf, 0, len); Code of the Program : import java.io.*; public class CopyFile{ private static void copyfile(string srfile, String dtfile){ try{ File f1 = new File(srFile); File f2 = new File(dtFile); InputStream in = new FileInputStream(f1); //For Append the file. // OutputStream out = new FileOutputStream(f2,true); Ads by Google Java Swing Sample Java Java AntiVirus Java Class //For Overwrite the file. OutputStream out = new FileOutputStream(f2); byte[] buf = new byte[1024]; int len; while ((len = in.read(buf)) > 0){ out.write(buf, 0, len); in.close(); out.close(); System.out.println("File copied."); catch(filenotfoundexception ex){ System.out.println(ex.getMessage() + " in the specified directory."); catch(ioexception e){ System.out.println(e.getMessage()); public static void main(string[] args){ switch(args.length){ case 0: System.out.println("File has not mentioned."); case 1: System.out.println("Destination file has not mentioned."); case 2: copyfile(args[0],args[1]); default : System.out.println("Multiple files are not allow."); Download File Copy Example Related Links by Google Java Sun, Sun Java, Java - Java Example C... java Beginner,java Beginners,Beginning java,beginners Java... JDBC - Java Database Connectivity JSP,EJB Tutorial,JDBC,Free Java Servlets... Java - JDK, JAVA Examples, JDK Examples Java Interview Question,Interview questions Java,Java Intervi... Related Searches by Google java Recently Viewed Java Script Code of Calendar and Date Picker or Popup Calendar Constructor Exception in Java Struts 1.x Vs Struts 2.x Preparing table for HQL Examples Java Building a Simple Web Service? A Tutorial Tutorial Java error java.lang.nullpointerexception Compare string example Java Exception - Exception Handling in Java J2EE Tutorial - Java Bean Software Solutions Software Solutions and Services Website Designing Services Web Designing Packages! From $150! Flex Outsourcing Hire Flex Developer Website Designing Company Web Hosting Website Designing Quotation Hire PHP Developer Hire PHP programmer PHP Outsourcing Java Project Outsourcing Hire Software Developer Hire Java Developer Hire iphone developer Outsourcing iphone development Offshore iphone Apps Development Search roseindia.net/java/ /CopyFile.shtml 2/5

3 java download java update copy file» View all related tutorials Ads by Google Java Flash Java Guide Java Web More in this series... Most Read Latest Search Beginners Java Tutorial views Randomizer views Access Static Member Of The Class Through Object views Date forms views Forcing Updates to a File to the Disk views Listing the File System Roots views Copy a file to other destination and show the modification time of destination file views Date Comparison views Constructing a File Name path views Extra Storage Merge Sort in Java views» View all related tutorials Related Tags: c algorithm ide array sorting data div merge sort storage order vi value number int this id ai element create Leave your comment: Name: URL: w w.roseindia.net/java/beginners/copyfile.shtml Title: Comments: Enter Code: Submit Comment Note: s will not be visible or used in any way, and are not required. Please keep comments relevant. Any content deemed inappropriate or offensive may be edited and/or roseindia.net/java/ /CopyFile.shtml 3/5

4 deleted. No HTML code is allowed. Line breaks will be converted automatically. URLs will be autolinked. Please use BBCode to format your text. Add This Tutorial To: Del.icio.us Digg Google Spurl Blink Furl Simpy Y! MyWeb Current Comments 11 comments so far (post your own) View All Comments Latest 10 Comments: How to pass the username and password from java file to j_security_check. Posted by ilango on Monday, 18:16pm #66159 Iam asking How to copy a file as word document from any format(ex:txt,png,jpeg...) Posted by anithavelde on Friday, 12:41pm #57839 I want to copy a file as word document from any format of file. please give the solution for my problem and send the solution to my ID Posted by anitha on Wednesday, 17:38pm #57698 I'm having trouble with this problem written below, can somebody help me? Please, I need it badly. I know there's a lot of java genius out there... Write a java program that will be able to: a. read text line by line; b. create a directory; c. delete files from the directory; d. list the contents of the directory; e. copy the contents of the file from one file to another; and f.write text to a file (character output stream) Posted by Odessy (student) on Sunday, 14:30pm #33809 i am proud of this website. Posted by Yuran on Saturday, 10:09am #33464 hi, ive run the sample program and i get the output that the file is not mention,,so for example which part of the program can i actually input the file to be copied and how can i check if the file has been copied...and lastly what file are we trying to copy here... Posted by gina esteban on Saturday, 14:00pm #22101 Excellent and easily understandable tutorial roseindia.net/java/ /CopyFile.shtml 4/5

5 Posted by hari on Tuesday, 17:15pm #18284 George, at the command line type: java CopyFile file1.txt file2.txt where file1.txt and file2.txt are your source(sr) and destination(dt) files. The contents of file1.txt will now be copied into the contents of file2.txt Posted by tivup on Sunday, 04:36am #13104 when tryin to run the file to file copy code. am gettin an errer ; File has not mentioned. But i created 2 files seperately nd renamed f1 nd f2 with those file names. still not workin.. kindly help... Posted by George on Friday, 15:49pm #12559 very good website for begineers and its realy cool and simple Posted by binu on Monday, 17:17pm #8386 Home JSP EJB JDBC Java Servlets WAP Free JSP Hosting Search Engine New s Archive Jboss 3.0 tutorial Free Linux CD's Forum Blogs About Us Advertising On RoseIndia.net Site Map Privacy Policy Send your comments, Suggestions or Queries regarding this site at roseindia_net@yahoo.com. Copyright All rights reserved. roseindia.net/java/ /CopyFile.shtml 5/5