Get The html file list using the FileFilter In java

 The following java program get the list of all html file from the directory folder



import java.io.File;
import java.io.FileFilter;


class GetHtmlFilesList {
    FileFilter htmFileFilter = new FileFilter() {
        @Override
        public boolean accept(File file) {
            if (file.getName().endsWith(".htm")) return true;
            else return false;
        }
    };
    public File[] getListOfHtmFiles(String dataPath) {
        File dataFolder = new File(dataPath);
        return dataFolder.listFiles(htmFileFilter);
    }
  public static void main(String arg[]) {
        String DATA_PATH="/home/brij/mathmuni2/docs/2017-11-30_updated/htm_and_images";
        GetHtmlFilesList getHtmlFileList=new GetHtmlFilesList();
        File[] fileList=getHtmlFileList.getListOfHtmFiles(DATA_PATH);
       
        for (File f : fileList) {
            System.out.println("File Name = "+f.getName());
        }
  }
}

Convert Time In String To Second In java

 In this java program calculate the second from given time in string. For example time="00:2:30:22" so the second of given time is 150 sec.


class ConvertTimeToSecond {

    public int getSecond() {
       //Time is string
        String timestampStr = "00:01:40.70";
        timestampStr = timestampStr.substring(0, timestampStr.lastIndexOf("."));
        String[] tokens = timestampStr.split(":");
        int hours = Integer.parseInt(tokens[0]);
        int minutes = Integer.parseInt(tokens[1]);
        int seconds = Integer.parseInt(tokens[2]);
        int duration = 3600 * hours + 60 * minutes + seconds;
        //System.out.println(duration);

        return duration;
    }

    public static void main(String arg[]) {

        ConvertTimeToSecond obj = new ConvertTimeToSecond();

        int totalSecond = obj.getSecond();

        System.out.println("Total Second " + totalSecond);

    }
}

The output is :
javac ConvertTimeToSecond.java
 java ConvertTimeToSecond

Total Second 100

Get The list of all file name from directory/folder and store into string array in java

Get The list of all file name from directory/folder and store into string array in java


import java.io.FileReader ;
    import java.io.File ;
    import java.io.FileNotFoundException ;
    import java.io.IOException ;
    import java.util.ArrayList ;

    class GetFileFromFolder {

        public String[] listOfFiles() {
            String pathLevel = "/home/brij/brijJava";

            File file = new File(pathLevel);
            String[] levelNames = file.list();

            return levelNames;
        }

        public static void main(String arg[]) {

            GetFileFromFolder obj = new GetFileFromFolder();

            String[] allFile = obj.listOfFiles();
            for (int i = 0; i < allFile.length; i++) {
                System.out.println("File Name " + allFile[i]);
            }

        }
    }

Now compile this from command line

 For compile


javac GetFileFromFolder.java

 For execute 
java GetFileFromFolder

File Name GetFileFromFolder.java
File Name GetFileFromFolder.java~
File Name GetFileFromFolder.class
File Name sql
File Name 25-11-17