Let us first create an ArraList and add some elements to it −ArrayList < String > arr = new ArrayList < String > (); arr.add("50"); arr.add("100"); arr.add("150"); arr.add("200"); arr.add("250"); arr.add("300");Now, create a new collection. We are creating Vector here −Vectorvector = new Vector(); vector.add("500"); vector.add("700"); vector.add("800"); vector.add("1000");Now, we will append ... Read More

The buffer can be compacted using the compact() method in the class java.nio.CharBuffer. This method does not require a parameter and it returns the new compacted CharBuffer with the same content as the original buffer. If the buffer is read-only, then the ReadOnlyBufferException is thrown.A program that demonstrates this is ... Read More

The LinkedTransferQueue Class in Java has a transfer queue that has unbounded functionality and is based on linked nodes. It uses FIFO for ordering elements. This class implements the Collection interface as well as the AbstractQueue class. It is a part of the Java Collection Framework.A program that demonstrates this ... Read More

The tag is used to specify the encoding type used by forms that post data back to the Web application.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultkeyName of character encoding you want to apply when decoding request parameters.YesNoneYou use the tag when you want to specify the character ... Read More

Let’s say the following is our Collection i.e. ArrayList −Listlist = new ArrayList(); list.add(100); list.add(200); list.add(200); list.add(200); list.add(300); list.add(400); list.add(400); list.add(500);Now, create another Collection −List list2 = new ArrayList(); list2.add(100); list2.add(200); list2.add(300); list2.add(400);To retain all elements from a Collection in another Collection, try the following with list and list2 ... Read More

Use DateTime to convert PHP variable “11:00 AM: to MySQL time format.The PHP code is as follows −$phpTime = '11:00 AM'; echo('The PHP Time Format is ='); echo ($phpTime); $timeFormat = DateTime::createFromFormat( 'H:i A', $phpTime); $MySQLTimeFormat = $timeFormat->format( 'H:i:s'); echo (' '); echo('The MySQL Time Format is ='); echo ($MySQLTimeFormat);The ... Read More

We will first set a list to unmodifiable and after that test if it is unmodifiable or not. Let us create a List and add elements −List list = new LinkedList (); list.add(10); list.add(20); list.add(30); list.add(40); list.add(50);Set the above list to unmodifiable −Listunmodifiable = Collections.unmodifiableList(list);Now, use If-else, to ... Read More

The ConcurrentLinkedDeque Class in Java implements a deque and used a concurrent linked list for help. This class implements the Collection interface as well as the AbstractCollection class. It is a part of the Java Collection Framework.A program that demonstrates this is given as follows −Example Live Demoimport java.util.concurrent.*; public class ... Read More

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

The tag sets the data source configuration variable or saves the data-source information in a scoped variable that can be used as input to the other JSTL database actions.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultdriverName of the JDBC driver class to be registeredNoNoneurlJDBC URL for the database connectionNoNoneuserDatabase ... Read More