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Creative Commons License
I had my head banging against the wall recently with a project I am working on; what I thought would be a relatively simple task turned out to be quite the opposite, well for a new comer to Java at least: copying one directory to another using Java.

After a relentless search I came across a number of different approaches using varying techniques, all of which were either poorly documented, used out dated components, or had me reaching for my dunce hat.

I did eventually find a solution, it didn’t quite fit my needs perfectly so I have modified slightly and included within my FileUtils class which also allows directory creation; creds go to the anonymous author on exampledepot.



public class FileUtils {

        //Takes in String representing the full path of the target directory
	public void createDir(String paramDir){
		String directory = paramDir;
			boolean success = (
					new File(directory)).mkdir();
			if (success) {
				System.out.println("Successfuly created " + directory);
			} else {
				System.out.println("Could not create directory");
				System.out.println("Check it doesn't exist already, and the permissions ");

		}catch (Exception e){
			System.err.println("Error running createDir method");
			System.err.println("Error: " + e.getMessage());

        //Takes in two String representing the full path of the source and destination
	public void copyDir(String paramSourceDir, String paramTargetDir){
		File sourceDir = new File(paramSourceDir);
		File targetDir = new File(paramTargetDir);

		if (sourceDir.isDirectory()) {
			if (!targetDir.exists()) {

			String[] children = sourceDir.list();
			System.out.println("Created " + targetDir.toString());
			for (int i=0; i 0) {
			out.write(buf, 0, len);
		}catch(Exception e){
			System.out.println("Error with copyFile method");
	}//end copyFile()

}//end class

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