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Manoj
FileOutputStream.write
1 Answer(s)      8 years ago
Posted in : Java Beginners

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May 16, 2008 at 4:22 PM


Hi

import java.io.*;
import javax.swing.*;

public class FileCopy{

public static void main(String[] args) throws IOException{
int a = 0;
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter the file or directory name that has to be moved : ");
String src = in.readLine();
if(src.equals("")){
System.out.println("Invalid directory or file name.");
System.exit(0);
}
File source = new File(src);
if(!source.exists()){
System.out.println("File or directory does not exist.");
System.exit(0);
}
System.out.print("Enter the complete path where file or directory has to be moved: ");
String dest = in.readLine();
if(dest.equals("")){
System.out.println("Invalid directory or file name.");
System.exit(0);
}
File destination = new File(dest);
if(!destination.exists()){
System.out.print("Mentioned directory does not exist. \nDo you want to create a new directory(Y/N)? ");
String chk = in.readLine();
if(chk.equals("Y") || chk.equals("y")){
destination.mkdir();
copyDirectory(source, destination);
a = 1;
}
else if(chk.equals("N") || chk.equals("n")){
System.exit(0);
}
else{
System.out.println("Invalid Entry!");
System.exit(0);
}
}
else{
int num = JOptionPane.showConfirmDialog(null, "Given file or folder name already exists. \nDo you want to replace now?");
if(num == 0){
copyDirectory(source, destination);
a = 1;
}
}
if(a == 1){
System.out.println("File or directory moved successfully.");
System.exit(0);
}
}
public static void copyDirectory(File sourceDir, File destDir)
throws IOException{

if(!destDir.exists()){
destDir.mkdir();

}

File[] children = sourceDir.listFiles();

for(File sourceChild : children){

String name = sourceChild.getName();

File destChild = new File(destDir, name);

if(sourceChild.isDirectory()){

copyDirectory(sourceChild, destChild);

}

else{

copyFile(sourceChild, destChild);

}

}

}


public static void copyFile(File source, File dest) throws IOException{

if(!dest.exists()){

dest.createNewFile();

}

InputStream in = null;
OutputStream out = null;

try{

in = new FileInputStream(source);

out = new FileOutputStream(dest);

byte[] buf = new byte[1024];

int len;

while((len = in.read(buf)) > 0){

out.write(buf, 0, len);

}

}

finally{

in.close();

out.close();

}

}




}
---------------------

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