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The last element of a Linked List can be retrieved using the method java.util.LinkedList.getLast() respectively. This method does not require any parameters and it returns the last element of the LinkedList.A program that demonstrates this is given as follows −Example Live Demoimport java.util.LinkedList; public class Demo { public static void main(String[] args) { LinkedList l = new LinkedList(); l.add("Andy"); l.add("Sara"); l.add("James"); l.add("Betty"); l.add("Bruce"); System.out.println("The last element of the Linked List is : " + l.getLast()); } }OutputThe last ... Read More
Personification is the attributing of human characteristics, thoughts, or emotions to something that is non-human. It is a rhetoric device that is used to convey something more than a literary meaning of a sentence.Example: The heavens wept at the incident.Now, in this sentence, heavens cannot weep but the idea of emotions and weeping is produced through “wept”. Heaven is non-living and it is weeping just like humans do. Hence, the sentence features personification.Example: The thunder clapped angrily from a distance.Definitely, the thunder cannot clap. It is a non-living thing but the writer wants to convey the intensity of clapping by ... Read More
The method java.io.File.getAbsolutePath() is used to obtain the absolute path name of a file or directory in the form of a string. This method requires no parameters.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo { public static void main(String[] args) { File file = new File("C:" + File.separator + "jdk11.0.2" + File.separator, "demo1.java"); System.out.println("The absolute path name is: " + file.getAbsolutePath()); } }The output of the above program is as follows −OutputThe absolute path name is:/C:/jdk11.0.2/demo1.javaNow let us understand the above program.The absolute pathname of ... Read More
To check how many users are present in MySQL, use MySQL.user table. The syntax is as follows to check how many users are present.mysql> SELECT User FROM mysql.user;The following output displays the users −+------------------+ | User | +------------------+ | Mac | | Manish | | mysql.infoschema | | mysql.session | | mysql.sys | | root ... Read More
To get the count of NavigableMap in Java, use the size() method.Let us first create NavigableMap and add elements −NavigableMap n = new TreeMap(); n.put(5, "Tom"); n.put(9, "John"); n.put(14, "Jamie"); n.put(1, "Tim"); n.put(4, "Jackie");Now, get the count −n.size()The following is an example to implement the size() method to get the count of the NavigableMap elements −Example Live Demoimport java.util.*; public class Demo { public static void main(String[] args) { NavigableMap n = new TreeMap(); n.put(5, "Tom"); n.put(9, "John"); ... Read More
The method java.io.File.getAbsoluteFile() is used to get the File object with the absolute path for the directory or file. This method requires no parameters.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo { public static void main(String[] args) { File file = new File("C:" + File.separator + "jdk11.0.2" + File.separator, "demo1.java"); System.out.println("The absolute file is: " + file.getAbsoluteFile()); } }The output of the above program is as follows −OutputThe absolute file is:/C:/jdk11.0.2/demo1.javaNow let us understand the above program.The file object with the absolute path is obtained ... Read More
The size() method is used in IdentityHashMap to get the size of the map i.e. the count of elements.Let us first create IdentityHashMap and add some elements −Map m = new IdentityHashMap(); m.put("1", 100); m.put("2", 200); m.put("3", 300); m.put("4", 150); m.put("5", 110); m.put("6", 50);Now, get the size −m.size()The following is an example to get the size of the IdentityHashMap using size() method −Example Live Demoimport java.util.*; public class Demo { public static void main(String[] args) { Map m = new IdentityHashMap(); m.put("1", 100); ... Read More
This example demonstrates how to get battery level and state in Android.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 a text view. it contains battery percentage.Step 3 - Add the following code to src/MainActivity.javapackage com.example.andy.myapplication; import android.os.BatteryManager; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.widget.TextView; public class MainActivity extends AppCompatActivity { int view = R.layout.activity_main; TextView text; @RequiresApi(api = ... Read More
The length of the current file specified by the abstract path name can be displayed using the method java.io.File.length(). The method returns the file length in bytes and does not require any parameters.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo { public static void main(String[] args) { try { File file = new File("demo1.txt"); file.createNewFile(); System.out.println("Length of file: " + file.length()); } catch(Exception e) { e.printStackTrace(); } ... Read More
To front pad zip code with 0, use LPAD() function in MySQL. The syntax is as follows −SELECT LPAD(yourColumnName, columnWidth+1, '0') as anyVariableName from yourTableName;To understand the above concept of LPAD() to add front pad zip code with 0, let us create a table. One of the columns of the table is Zip Code. The following is the query to create a table.mysql> create table ZipCodePadWithZeroDemo −> ( −> Name varchar(200), −> YourZipCode int(6) −> ); Query OK, 0 rows affected (0.44 sec)Insert some records in the table. The query to insert records is as follows ... Read More