File handling in java

Input and output in a file :

  For taking input and produce output from a file, at first we need to create 2 text files which means the file extension must be .txt. The file has to create in the location in which we will save our java

source code.

For example the input text file we taken is input.txt and our output file name is output.txt .We will use thous code for include them in code:

in = new FileInputStream("input.txt"); out = new FileOutputStream("output.txt");

Here is the full code :
import java.io.*; public class CopyFile { public static void main(String args[]) throws IOException { FileInputStream in = null; FileOutputStream out = null; try { in = new FileInputStream("input.txt"); out = new FileOutputStream("output.txt"); int c; while ((c = in.read()) != -1) { out.write(c); } } finally { if (in != null) { in.close(); } if (out != null) { out.close(); } } } }

Now if we write "Hello World" in the text file named input.txt and save it. Then run the code. The output.txt file now shows the same text as the text in the input, txt file.
Here is the link to the source file of this code. Click to download.

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