Question

Write a java program to merge the contents of two file into a single file.

Answer 1

/* Java Program Example - Merge Two Files */

import java.io.*;
import java.util.Scanner;

public class JavaProgram
{
public static void main(String args[])
{

String srcy, srcz, merge;
Scanner scan = new Scanner(System.in);

/* enter the file names with extension like file.txt */

System.out.print("Enter First File Name : ");
srcy = scan.nextLine();
System.out.print("Enter Second File Name : ");
srcz = scan.nextLine();

System.out.print("Enter FileName to Store merged content of First and Second File : ");
merge = scan.nextLine();

File[] files = new File[2];
files[0] = new File(srcy);
files[1] = new File(srcz);

File mergedFile = new File(merge);

mergeFiles(files, mergedFile);

}

public static void mergeFiles(File[] files, File mergedFile)
{
FileWriter fstream = null;
BufferedWriter out = null;

try
{
fstream = new FileWriter(mergedFile, true);
out = new BufferedWriter(fstream);
}
catch(IOException e1)
{
e1.printStackTrace();
}

System.out.print("Merging Both File...\n");

for(File f : files)
{
FileInputStream fis;
try
{
fis = new FileInputStream(f);
BufferedReader in = new BufferedReader(new InputStreamReader(fis));

String aLine;
while((aLine = in.readLine()) != null)
{
out.write(aLine);
out.newLine();
}

in.close();
}
catch(IOException e)
{
e.printStackTrace();
}
}
System.out.print("\nMerged Successfully..!!");

try
{
out.close();
}
catch(IOException e)
{
e.printStackTrace();
}
}
}