hu2di

public class Singleton {
  
  private static final Singleton instance = new Singleton();
  
  private Singleton() {
  }
  
  public static Singleton getInstance() {
    return instance;
  }

hu2di

private void getKeyHash() {
    try {
        PackageInfo info = getPackageManager().getPackageInfo(
                "your Application Id",
                PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
        }

hu2di

public class MySubString {  

     public static void main(String args[]) {  
          String s1="HuyHung";  
          System.out.println(s1.substring(2,4));//return yH
          System.out.println(s1.substring(2));  //return yHung  
     }
} 

hu2di

public static void printNameOfVideos(Context context) {
    Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
    String[] projection = { MediaStore.Video.VideoColumns.DATA };
    Cursor c = context.getContentResolver().query(uri, projection, null, null, null);
    int vidsCount = 0;
    if (c != null) {
        vidsCount = c.getCount();
        while (c.moveToNext()) {
            Log.d("VIDEO", c.getString(0));
        }

hu2di

<script>
    window.fbAsyncInit = function() {
        FB.init({
            appId    :    'your facebook app id',
            xfbml    :    true,
            version:    'v2.6'
        });
    };
    (function(d, s, id) {
        var js, fjs = d.getElementsByTagName(s) [0];

hu2di

//nstallation:
//npm install --save xml2js
//Usage:
//Read XML
var returnJSONResults = function(baseName, queryName) {
    var XMLPath = "data.xml";
    var rawJSON = loadXMLDoc(XMLPath);
    function loadXMLDoc(filePath) {
        var fs = require('fs');
        var xml2js = require('xml2js');

hu2di

#include<stdio.h>
int main()
{
    char input[200];
    while(1)
    {
        printf("\n\n");
        gets(input);
        printf(input);
    }

hu2di

 int n;
            n = int.Parse(Console.ReadLine());
            double sum = 0.0;
            for (int iCount = 1; iCount <= n; iCount++)
            {
                sum = sum + 1 / iCount;
            }
            Console.WriteLine("Ket qua: {0}", sum);

hu2di

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Constructor
{
    class Program
    {

hu2di

//<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

public void ReadFile() {
        try {
            File f = new File(filename);
            FileInputStream fIn = context.openFileInput(f.getPath());
            ObjectInputStream oIn = new ObjectInputStream(fIn);
            myPost = (ArrayList<Status>) oIn.readObject();
            oIn.close();
            fIn.close();