To catch an exception for both base and derive class then we need to put catch block of derived class before the base class. Otherwise, the catch block of derived class will never be reached.AlgorithmBegin    Declare a class B.    Declare another class D which inherits class B.   ... Read More

To get the duplicate numbers for random numbers in a range, loop through and create two Random class objects −Use nextInt() to get the next number −intrandVal1 = new Random().nextInt(50); intrandVal2 = new Random().nextInt(50);Now, compare both the above numbers −if (randVal1 == randVal2) {    System.out.println("Duplicate number = "+randVal1); }All ... Read More

You can easily add multiple items with only one insert command. The syntax is as follows −insert into yourTableName(yourColumnName1, yourColumnName2, ......N) values(yourValue1, yourValue2, ....N), (yourValue1, yourValue2, ....N), ..........N;Let us first create a table −mysql> create table DemoTable (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Value1 int,    Value2 ... Read More

A view of the ByteBuffer can be created as a CharBuffer using the asCharBuffer() method in the class java.nio.ByteBuffer. This method requires no parameters and it returns a char buffer as required. This buffer reflects the changes made to the original buffer and vice versa.A program that demonstrates this is ... Read More

Create a Calendar instance and Date object −Calendar cal = Calendar.getInstance(); Date date = new Date(); cal.setTime(date);Now, create a HashMap and store Date value −LinkedHashMaphashMap = new LinkedHashMap(); hashMap.put("year", cal.get(Calendar.YEAR)); hashMap.put("month", cal.get(Calendar.MONTH)); hashMap.put("day", cal.get(Calendar.DAY_OF_MONTH));Example Live Demoimport java.util.Calendar; import java.util.Date; import java.util.LinkedHashMap; public class Demo {    public static void main(String[] argv) ... Read More

You can use update along with lower() function for this. Let us first create a table −mysql> create table DemoTable (    Id varchar(100),    StudentFirstName varchar(20),    StudentLastName varchar(20),    StudentCountryName varchar(10) ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> ... Read More

Following is the for loop example − FOR LOOP Example JSP Tutorial The above code will generate the following result −JSP Tutorial JSP Tutorial JSP Tutorial

A new ByteBuffer can be allocated using the method allocate() in the class java.nio.ByteBuffer. This method requires a single parameter i.e. the capacity of the buffer. It returns the new ByteBuffer that is allocated. If the capacity provided is negative, then the IllegalArgumentException is thrown.A program that demonstrates this is ... Read More

Let’s say the following is the List −List list = Arrays.asList("Welcome", "to", "the", "club", "club", "the");No, let us create a Map to get the frequency of words. Here, we are using Lambda Expression as well −Map map = list    .parallelStream()    .flatMap(a -> Arrays.asList(a.split(" ")).stream())    .collect(    Collectors.toConcurrentMap(c ... Read More

Use the concept of IFNULL() method to treat NULL as 0. Let us first create a table −mysql> create table DemoTable (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Value1 int,    Value2 int ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using ... Read More