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To get Tail Map from TreeMap, let us first create a TreeMap and set key-value pair −TreeMaptMap = new TreeMap(); tMap.put("1", "A"); tMap.put("2", "B"); tMap.put("3", "C"); tMap.put("4", "D"); tMap.put("5", "E"); tMap.put("6", "F"); tMap.put("7", "G");Now, let’s say you need to get the tailmap from 2 i.e. all the key-value pairs after 2. For that, use the method tailMap() −SortedMapmap = tMap.tailMap("2");Example Live Demoimport java.util.SortedMap; import java.util.TreeMap; public class Demo { public static void main(String[] args) { TreeMaptMap = new TreeMap(); tMap.put("1", "A"); tMap.put("2", "B"); tMap.put("3", "C"); ... Read More
You cannot use backticks with column value. For this, use only table name or column name. If you use backtick with column value then MySQL will give the following error message:ERROR 1054 (42S22): Unknown column '191.23.41.10' in 'where clause'Let us first create a table:mysql> create table DemoTable6 ( SystemIPAddress varchar(200) ); Query OK, 0 rows affected (0.46 sec)Following is the query to insert some records in the table using insert command:mysql> insert into DemoTable values('192.68.1.0'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('191.23.41.10'); Query OK, 1 row affected (0.12 sec)Now you can display specific record ... Read More
The method java.lang.System.getProperty() is used to obtain the system property. This system property is specified by the key which is the parameter for the method. To obtain the current working directory, the key used is user.dir.A program that demonstrates this is given as follows −Example Live Demopublic class Demo { public static void main(String[] argv) throws Exception { String currentDirectory = System.getProperty("user.dir"); System.out.println("The current working directory is " + currentDirectory); } }The output of the above program is as follows −OutputThe current working directory is c:\JavaProgramNow let us understand the above program.The current ... Read More
It can be checked if a buffer has the backing of an accessible char array by using the method hasArray() in the class java.nio.CharBuffer. This method returns true if the buffer has the backing of an accessible int array and false otherwise.A program that demonstrates this is given as follows −Example Live Demoimport java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { CharBuffer buffer = CharBuffer.allocate(5); buffer.put('A'); buffer.put('P'); ... Read More
Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to access this database, you don't need to establish any kind of connections for it like JDBC, ODBC etc.This example demonstrate about How to filter data using where Clause, “BETWEEN” and “AND” in Android sqlite.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and ... Read More
There are two different ways by which you can store date/time in MongoDB. In the first approach, you can use Date objects like JavaScript. The Date object is the best way to store date/time in MongoDB. The syntax is as follows:new Date();In the second approach, you can use ISODate(). The syntax is as follows:new ISODate();To understand the above syntax, let us create a collection with documents following the first approach. The query to create a collection with document is as follows:The first approach:> db.ProductsInformation.insertOne({"ProductId":"Product-1", "ProductDeliveryDateTime":new Date()}); { "acknowledged" : true, "insertedId" : ObjectId("5c6ec6786fd07954a4890686") }The second approach:> db.ProductsInformation.insertOne({"ProductId":"Product-2", "ProductDeliveryDateTime":new ... Read More
This example demonstrates How to allow to go next internal pages in android webview.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken web view to show facebook.com.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.app.ProgressDialog; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.webkit.CookieManager; import android.webkit.WebChromeClient; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.EditText; public class MainActivity ... Read More
Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to access this database, you don't need to establish any kind of connections for it like JDBC, ODBC etc.This example demonstrate about How to find tables modified in the last hour in Android sqlite.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill ... Read More
The difference between two LocalDate objects can be obtained using the until() method in the LocalDate class in Java. This method requires a single parameter i.e. the end date for the LocalDate object and it returns the difference between two LocalDate objects using a Period object.A program that demonstrates this is given as follows:Example Live Demoimport java.time.*; public class Demo { public static void main(String[] args) { LocalDate ld1 = LocalDate.parse("2019-01-10"); LocalDate ld2 = LocalDate.parse("2019-02-14"); System.out.println("The first LocalDate is: " + ld1); System.out.println("The second LocalDate is: " + ... Read More
An immutable copy of a LocalDateTime with the nanoseconds altered as required is done using the method withNano() in the LocalDateTime class in Java. This method requires a single parameter i.e. the nanosecond that is to be set in the LocalDateTime and it returns the LocalDateTime with the nanosecond altered as required.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Main { public static void main(String[] args) { LocalDateTime ldt1 = LocalDateTime.parse("2019-02-18T23:15:30"); System.out.println("The LocalDateTime is: " + ldt1); LocalDateTime ldt2 = ldt1.withNano(5); ... Read More