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This example demonstrate about How to detect a new Android notificationStep 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 src/MyListener.javapublic interface MyListener { void setValue (String packageName) ; }Step 3 − Add the following code to src/MyListener.javapackage app.tutorialspoint.com.notifyme ; import android.content.Context ; import android.service.notification.NotificationListenerService ; import android.service.notification.StatusBarNotification ; import android.util.Log ; public class NotificationService extends NotificationListenerService { private String TAG = this .getClass().getSimpleName() ; Context context ; static MyListener myListener ; @Override ... Read More
In C++, we have different containers like vector, list, set, map etc. To iterate through these containers, we can use the iterators. We should be careful when we are using iterators in C++. When we are using iterating over a container, then sometimes, it may be invalidated. If the shape, size is changed, then we can face this kind of problems. In the following example, we can identify the problem of invalidation.Example Code#include #include using namespace std; int main() { vector vec{11, 55, 110, 155, 220}; for (auto it=vec.begin(); it!=vec.end(); it++) if ... Read More
To set different height for multiple rows, use the setRowHeight() method for separate rows for which you want to increase the row height. Let us first see an example to create a table with same height for all the rows −Examplepackage my; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.DefaultTableModel; public class SwingDemo { public static void main(String[] argv) throws Exception { DefaultTableModel tableModel = new DefaultTableModel(); JTable table = new JTable(tableModel); tableModel.addColumn("Language/ Technology"); tableModel.addColumn("Text Tutorial"); tableModel.addColumn("Video Tutorial"); ... Read More
Yes, it is possible with triggers. You can create trigger for automatic conversion on lower case. Let us first create a table −mysql> create table DemoTable ( StudentSubject text ); Query OK, 0 rows affected (0.61 sec)Let us create a trigger for automatic conversion on lower case −mysql> CREATE TRIGGER lowerCaseOnInsertDemo BEFORE INSERT ON DemoTable FOR EACH ROW SET NEW.StudentSubject = LOWER(NEW.StudentSubject); Query OK, 0 rows affected (0.21 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('MOngoDb'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('JaVA'); Query OK, ... Read More
In C++ , function pointers when dealing with member functions of classes or structs, it is invoked using an object pointer or a this call. We can only call members of that class (or derivatives) using a pointer of that type as they are type safe.Example Live Demo#include using namespace std; class AB { public: int sub(int a, int b) { return a-b; } int div(int a, int b) { return a/b; } }; //using function pointer int res1(int ... Read More
The HTML DOM Link href property sets/returns the path/url of a linked document. −SyntaxFollowing is the syntax −Returning href attribute valuelinkObject.hrefSetting href to a stringlinkObject.href = stringBoolean ValuesHere, “string” can be the following −booleanValueDetailspathIt defines the absolute/relative path to a document.urlIt defines the url address of the document to be linked.ExampleLet us see an example for Link href property − Link href Link-href Sales Target Week: var divDisplay = document.getElementById("divDisplay"); var inputWeek = document.getElementById("WeekSelect"); var extStyle = document.getElementById("extStyle"); divDisplay.textContent = 'Week ... Read More
Let’s say the following is the String List:List list = new ArrayList(); list.add("Tom"); list.add("John"); list.add("David"); list.add("Paul"); list.add("Gayle"); list.add("Narine"); list.add("Joseph");Now, let’s say you need to filter elements beginning with a specific letter. For that, use filter() and startsWith():long res = list .stream() .filter((s) -> s.startsWith("J")) .count();We have also counted the elements above after filtering using count().The following is an example to count element after filtering in Java:Exampleimport java.util.ArrayList; import java.util.List; public class Demo { public static void main(final String[] args) { List list = new ArrayList(); list.add("Tom"); list.add("John"); ... Read More
Based on linear algebra Hill cipher is a polygraphic substitution cipher in cryptography.To encrypt message: The key string and message string are represented as matrix form. They are multiplied then, against modulo 26. The key matrix should have inverse to decrypt the message.To decrypt message: The encrypted message is multiplied by inverse key matrix used for encryption against modulo 26 to get decrypt message.For exampleKey matrix1 0 1 2 4 0 3 5 6Message string ‘ABC’ in matrix form −0 1 2For encryptionAfter multiplying above two matrices we get, 2 4 17Which will be the encrypted message ‘CER’For decryptionInverse of ... Read More
Composite pattern is used where we need to treat a group of objects in similar way as a single object. Composite pattern composes objects in term of a tree structure to represent part as well as whole hierarchy. This type of design pattern comes under structural pattern as this pattern creates a tree structure of group of objects.This pattern creates a class that contains group of its own objects. This class provides ways to modify its group of same objects.We are demonstrating use of composite pattern via following example in which we will show employees hierarchy of an organization.Here we ... Read More
To set the alignment of the label’s content along the X axis on the right, use the setHorizontalAlignment() method and set the location. Let us first set a label component. We have set the label background color as well so that we can check the alignment of the label’s content properly −JLabel label = new JLabel("Stationery"); label.setPreferredSize(new Dimension(190, 100)); label.setOpaque(true); label.setBackground(Color.GREEN); label.setForeground(Color.WHITE);Now, we will align the label content along the X axis on the top by seeting location as RIGHT −label.setHorizontalAlignment(JLabel.RIGHT);The following is an example: to set the alignment of the label content along the X axis on the right ... Read More