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Ian
Find the files that has been modified before run the program
1 Answer(s)      a year and 7 months ago
Posted in : Java Beginners


Hi. I have a code that can find the latest modified file in the directory.

//store the file to the list
        List<File> list = new ArrayList<File>(Arrays.asList(store));
        //combine all the file at main folder and sub folder
        Object[] combine = list.toArray();
        //sort the file according to the date
        Arrays.sort(combine, new Comparator<Object>(){
            public int compare(Object o1, Object o2){
                return compare((File)o1, (File)o2);
            }
            public int compare( File f1, File f2){
                long StartTime = f2.lastModified() - f1.lastModified();
                if( StartTime > 0 ){
                    return 1;
                }else if( StartTime < 0 ){
                    return -1;
                }else {
                    return 0;
                }
            }
        });
        //get the file name that has latest modified date
        files = ((File) combine[0]).getName();
        //get the file date that has latest modified date
        lastModifiedDate = new java.util.Date(((File)combine[0]).lastModified()).toString();
        System.out.println("The latest modified file is : "+files);
        System.out.println("The time for the latest modified's file is :");
        System.out.println(lastModifiedDate);
    }
}

When i modified a file in the directory and run the program, it can list out the file that i has been modified. But when i modified more then 1 files in the directory and run the program, it can only show the file that has the latest modification time. My question is: How can i list out all the files that has been modified before i run the program?


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May 30, 2013 at 9:08 AM


Please help me remove this post ya. I had re-post the question. Thank you.



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