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Before getting into an example, we should know what CopyOnWriteArraySet is. It is a thread-safe variant of ArrayList and operations add, set, and so on by making a fresh copy of the underlying array.This example demonstrates about How to use in android CopyOnWriteArraySetStep 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 to show CopyOnWriteArraySet elements.Step 3 − Add the following code to ... Read More
Before getting into an example, we should know what LinkedBlockingDeque is. It is implemented by Collection interface and the AbstractQueue class. It provides optional boundaries based on linked nodes. It going to pass memory size to a constructor and helps to provide memory wastage in android.This example demonstrates about How to use getLast() in android LinkedBlockingDequeStep 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 ... Read More
Use the COLUMN_NAME to find which table in a database contains a specific column. Let us first create a table −mysql> create table DemoTable -> ( -> CustomerId int, -> CustomerName varchar(20), -> CustomerCountryName varchar(100) -> ); Query OK, 0 rows affected (1.05 sec)Following is the query to find in which tables a specific column “'CustomerCountryName'” is present −mysql> select *from information_schema.columns WHERE COLUMN_NAME = 'CustomerCountryName';OutputThis will produce the following output −+---------------+--------------+--------------+---------------------+------------------+----------------+-------------+-----------+--------------------------+------------------------+-------------------+---------------+--------------------+--------------------+-----------------+--------------+------------+-------+---------------------------------+----------------+-----------------------+-------+ | TABLE_CATALOG | TABLE_SCHEMA | TABLE_NAME | COLUMN_NAME |ORDINAL_POSITION | COLUMN_DEFAULT | IS_NULLABLE | DATA_TYPE |CHARACTER_MAXIMUM_LENGTH | CHARACTER_OCTET_LENGTH |NUMERIC_PRECISION ... Read More
Before getting into an example, we should know what CopyOnWriteArrayList is. It is a thread-safe variant of ArrayList and operations add, set, and so on by making a fresh copy of the underlying array.This example demonstrates about How to use CopyOnWriteArrayList in androidStep 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 to show CopyOnWriteArrayList elements.Step 3 − Add the following code to ... Read More
Let us first create a table −mysql> create table DemoTable -> ( -> FirstName varchar(20), -> LastName varchar(20) -> ); Query OK, 0 rows affected (1.44 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John', 'Smith'); Query OK, 1 row affected (0.35 sec) mysql> insert into DemoTable values('Chris', 'Brown'); Query OK, 1 row affected (0.37 sec) mysql> insert into DemoTable values('Carol', 'Taylor'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('David', 'Miller'); Query OK, 1 row affected (0.24 sec)Display all records from the table using ... Read More
Before getting into an example, we should know what CopyOnWriteArraySet is. It is a thread-safe variant of ArrayList and operations add, set, and so on by making a fresh copy of the underlying array.This example demonstrates about How to use containsAll() in android CopyOnWriteArraySetStep 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 to show CopyOnWriteArraySet elements.Step 3 − Add the following code ... Read More
Let us first create a table −mysql> create table DemoTable -> ( -> Name text -> ); Query OK, 0 rows affected (1.31 sec)Insert some records in the table using insert command. Here, we have inserted a name with a specific word “name”, which we need to ignore −mysql> insert into DemoTable values('John 7'); Query OK, 1 row affected (0.65 sec) mysql> insert into DemoTable values('John 6'); Query OK, 1 row affected (0.42 sec) mysql> insert into DemoTable values('John 9'); Query OK, 1 row affected (0.33 sec) mysql> insert into DemoTable values('name John 3'); ... Read More
Before getting into an example, we should know what PriorityBlockingQueue is. It is an unbounded queue and follows the same order as a priority queue. The main usage of priority blocking queue is, it going to handle out of memory error.This example dem onstrates about How to use contains() in android PriorityBlockingQueueStep 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 to ... Read More
Use equal to operator for an exact match −select *from yourTableName where yourColumnName=yourValue;Let us first create a table −mysql> create table DemoTable -> ( -> FirstName varchar(100), -> LastName varchar(100) -> ); Query OK, 0 rows affected (0.70 secInsert some records in the table using insert command −mysql> insert into DemoTable values('John', 'Smith'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('John', 'Doe'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('Chris', 'Brown'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Carol', 'Taylor'); Query OK, 1 row affected ... Read More
Use the LPAD() function to left pad values. Let us first create a table −mysql> create table DemoTable -> ( -> Number int -> ); Query OK, 0 rows affected (2.26 secInsert some records in the table using insert command −mysql> insert into DemoTable values(857786); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values(89696); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(89049443); Query OK, 1 row affected (0.25 secDisplay all records from the table using select statement −mysql> select *from DemoTable;OutputThis will produce the following output −+----------+ | ... Read More