function to print the repeated values in an array with it's count

public static void printRepeating(int arr[], int size)

{

int i,j;

System.out.println("The repeating elements are : ");

HashMap<Integer, Integer> hmap = new HashMap<>();

for (i = 0; i < size-1; i++)

{

int c=1;

for (j = i+1; j < size; j++)

{

if(arr[i]==arr[j]){

c++;

}

}

if(c>1&& !hmap.containsValue(arr[i])){

hmap.put(c,arr[i]);

}

}

for (int k:hmap.keySet()){

System.out.println(hmap.get(k)+" : count "+k);

}

}

java program to download file from url

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

public class URLReader {

    public static void copyURLToFile(URL url, File file) {

        try {
            InputStream input = url.openStream();
            if (file.exists()) {
                if (file.isDirectory())
                    throw new IOException("File '" + file + "' is a directory");

                if (!file.canWrite())
                    throw new IOException("File '" + file + "' cannot be written");
            } else {
                File parent = file.getParentFile();
                if ((parent != null) && (!parent.exists()) && (!parent.mkdirs())) {
                    throw new IOException("File '" + file + "' could not be created");
                }
            }

            FileOutputStream output = new FileOutputStream(file);

            byte[] buffer = new byte[4096];
            int n = 0;
            while (-1 != (n = input.read(buffer))) {
                output.write(buffer, 0, n);
            }

            input.close();
            output.close();

            System.out.println("File '" + file + "' downloaded successfully!");
        }
        catch(IOException ioEx) {
            ioEx.printStackTrace();
        }
    }

    public static void main(String[] args) throws IOException {

        //URL pointing to the file
        String sUrl = "https://singztechmusings.files.wordpress.com/2011/09/maven_eclipse_and_osgi_working_together.pdf";

        URL url = new URL(sUrl);

        //File where to be downloaded
        File file = new File("home\\sujith\\IdeaProjects\\downloadTest");

        URLReader.copyURLToFile(url, file);
    }

}

java program to download a file from an external url

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.URL;

import org.apache.commons.io.FileUtils;

public class FileDownloadTest {

public static void main(String[] args) {

try {

// Make sure that this
directory exists

String dirName = "home\\sujith\\FileDownload";

System.out.println("Downloading \'Maven, Eclipse and OSGi
working together\' PDF document...");

saveFileFromUrlWithJavaIO(

dirName +
"\\maven_eclipse_and_osgi_working_together.pdf",

"https://singztechmusings.files.wordpress.com/2011/09/maven_eclipse_and_osgi_working_together.pdf");

System.out.println("Downloaded \'Maven, Eclipse and OSGi working
together\' PDF document.");

System.out.println("Downloading \'InnoQ Web Services Standards
Poster\' PDF document...");

saveFileFromUrlWithCommonsIO(

dirName +
"\\innoq_ws-standards_poster_2007-02.pdf",

"http://singztechmusings.files.wordpress.com/2011/08/innoq_ws-standards_poster_2007-02.pdf");

System.out.println("Downloaded \'InnoQ Web Services Standards
Poster\' PDF document.");

} catch (MalformedURLException
e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

// Using Java IO

public static void
saveFileFromUrlWithJavaIO(String fileName, String fileUrl)

throws
MalformedURLException, IOException {

BufferedInputStream in = null;

FileOutputStream fout = null;

try {

in = new
BufferedInputStream(new URL(fileUrl).openStream());

fout = new
FileOutputStream(fileName);

byte data[] = new
byte[1024];

int count;

while ((count =
in.read(data, 0, 1024)) != -1) {

fout.write(data, 0,
count);

}

} finally {

if (in != null)

in.close();

if (fout != null)

fout.close();

}

}

// Using Commons IO library

// Available at
http://commons.apache.org/io/download_io.cgi

public static void
saveFileFromUrlWithCommonsIO(String fileName,

String fileUrl) throws MalformedURLException, IOException
{

FileUtils.copyURLToFile(new
URL(fileUrl), new File(fileName));

}

}

//https://mvnrepository.com/artifact/commons-io/commons-io/2.4

Android application using shared preference.

/***************************************************************************************

Program Name: Write an android application using shared preference.

Author: sujith

Date: 25-10-2016

***************************************************************************************/

ActivityMain.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="15dp"
tools:context="com.example.shamanthrai.sharedpreference.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Shared Preference "
android:id="@+id/textView"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textSize="35dp" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/editText"
android:layout_below="@+id/textView"
android:layout_marginTop="67dp"
android:hint="Name"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/editText3"
android:layout_below="@+id/editText"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:paddingTop="20dp"
android:hint="Email" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save"
android:id="@+id/btnSave"
android:layout_below="@+id/editText3"
android:layout_marginTop="50dp"
android:layout_marginLeft="10dp"
android:onClick="Save"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Get"
android:id="@+id/btnGet"
android:layout_toRightOf="@+id/btnSave"
android:layout_below="@id/editText3"
android:layout_marginTop="50dp"
android:layout_centerVertical="true"
android:onClick="Get"
android:layout_marginLeft="40dp"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Clear"
android:id="@+id/btnClear"
android:layout_toRightOf="@+id/btnGet"
android:layout_below="@id/editText3"
android:layout_marginTop="50dp"
android:layout_marginLeft="30dp"
android:onClick="Clear"/>
</RelativeLayout>

MainActivity.java:

package com.example.shamanthrai.sharedpreference;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
SharedPreferences sharedpreferences;
TextView name,email;
public static final String MyPREFERENCES = "MyPrefs" ;
public static final String Name = "nameKey";
public static final String Email = "emailKey";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
name = (TextView) findViewById(R.id.editText);
email = (TextView) findViewById(R.id.editText3);
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
if (sharedpreferences.contains(Name)) {
name.setText(sharedpreferences.getString(Name, ""));
}
if (sharedpreferences.contains(Email)) {
email.setText(sharedpreferences.getString(Email, ""));
}
}
public void Save(View view){
String n=name.getText().toString();
String e=email.getText().toString();
Editor editor=sharedpreferences.edit();
editor.putString(Name,n);
editor.putString(Email,e);
editor.commit();
Toast.makeText(MainActivity.this,"Saved!!", Toast.LENGTH_LONG).show();
}
public void Clear(View view)
{
name=(TextView)findViewById(R.id.editText);
email=(TextView)findViewById(R.id.editText3);
name.setText("");
email.setText("");
}
public void Get(View view){
name=(TextView)findViewById(R.id.editText);
email=(TextView)findViewById(R.id.editText3);
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);

if (sharedpreferences.contains(Name)) {
name.setText(sharedpreferences.getString(Name, ""));
}
if (sharedpreferences.contains(Email)) {
email.setText(sharedpreferences.getString(Email, ""));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
}

OUTPUT: