Determining if two Filename paths refer to the same
file.
This program is going to determine that the file name
refers to the same file or not. What you need to do is to
create two File object and pass the file name in the constructor of both the File
class. Now match both the file instances. It will return false if the file paths are not
equal. To send the true value we first have to normalize both the paths, only
after that it
will return true.
In this program we have used following methods:
equals():
This is the method of String class. It checks whether the pathname are
equal or not.
getCanonicalFile():
It denotes the same file or
directory its abstract pathname. It throws IOException and SecurityException.
Code of the program is given below:
import java.io.*;
public class FileNameReferToSameFile{
public static void main(String args[]){
File file1 = new File("./filename.txt");
File file2 = new File("filename.txt");
System.out.println("Actual fileName1 = " + file1 + "\n");
System.out.println("Actual fileName2 = " + file2 + "\n");
// It returns false if Filename paths are not equal
boolean b = file1.equals(file2);
System.out.println("It checks whether the file name
paths are equal or not" + b);
// Normalize the paths
try {
file1 = file1.getCanonicalFile(); // c:\tapan\filename
file2 = file2.getCanonicalFile(); // c:\tapan\filename
System.out.println("Actual path of filName1 = " + file1 + "\n");
System.out.println("Actual path of fileName2 = " + file2 + "\n");
} catch (IOException e) {
System.out.println("IOException is "+ e);
}
// It returns true if Filename paths are equal
b = file1.equals(file2);
System.out.println("the file name are now equal" + b);
System.out.println("Actual path of fileName1 = " + file1 + "\n");
System.out.println("Actual path of fileName2 = " + file2 + "\n");
}
}
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Output of this program is given below:
C:\FileNameReferToSameFile>java FileNameReferToSameFile
Actual Filename1 = .\FileNameReferToSameFile.txt
Actual Filename2 = FileNameReferToSameFile.txt
It checks whether the file name are equal or notfalse
Actual Filename1 = C:\FileNameReferToSameFile\FileNameReferToSameFile.txt
Actual Filename2 = C:\FileNameReferToSameFile\FileNameReferToSameFile.txt
the file name are now equaltrue
Actual Filename1 = C:\FileNameReferToSameFile\FileNameReferToSameFile.txt
Actual Filename2 = C:\FileNameReferToSameFile\FileNameReferToSameFile.txt |
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