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File getCanonicalFile() converts a filename path to a unique canonical form suitable for comparisons

import java.io.File; public class Main {   public static void main(String[] argv) throws Exception {     File file1 = new File("./filename");     File file2 = new File("filename");     System.out.println(file1.equals(file2));     file1 = file1.getCanonicalFile();     file2 = file2.getCanonicalFile();     System.out.println(file1.equals(file2));   } }