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Articles by Alshifa Hasnain
Page 18 of 23
Java program to map string list to lowercase and sort
In this article, we will learn to map a String list to lowercase and sort in Java. We need to manipulate the elements of a list, such as converting all strings to lowercase and sorting them. This is particularly useful when dealing with user input, file processing, or data normalization. Problem Statement Given a list of strings, we want to convert all strings to lowercase and sort the list in reverse alphabetical order.For Example: Input ["Apple", "banana", "Cherry", "date"] Output ["date", "cherry", "banana", "apple"] Using Streams API The Streams API provides a useful and functional approach to processing ...
Read MoreJava program to display date and time information in uppercase
In this article, we will learn to display the date and time in uppercase using Java. Working with date and time in Java is a common requirement in various applications, logging, scheduling, or data processing. Different Approaches The following are the two different approaches to display the date and time in uppercase using Java − Using Formatter and Calendar Using DateTimeFormatter Using Formatter and Calendar The Formatter class in Java allows us to format date and time using the %Tc specifier. We can then convert the output to uppercase using ...
Read MoreIs string a primitive data type or an object in Java?
In Java there are various data types present, the String type often leads to confusion regarding whether it is a primitive data type or an object(non-primitive data type ). Primitive Data Types in Java Primitive data types are the most basic data types the Java language provides. Primitive data types are not objects and do not have methods or properties. Eg: int (32-bit), float(32-bit), double(64-bit ), etc. What is String in Java? A string is not a primitive data type. Java.lang package provides the String class therefore, it is an object type. The String class provides methods to manipulate and operate ...
Read MoreCan a final class be subclassed in Java?
In Java Inheritance is a fundamental feature that allows a class to derive properties and behaviors from another class. In Java, not all classes can be subclassed. A final class is a special type of class that cannot be extended. What is a Final Class in Java? In Java, a class is declared final using the final keyword. The final modifier for finalizing the implementations of classes, methods, and variables. When a class is marked as final, it means − It cannot be extended. All its methods remain unchanged in their ...
Read MoreHow to declare a local variable in Java?
In Java, local variables are those that have been declared within a method, constructor, and block, and are only accessible within that defined scope. Such local variables are used when there is a need to store temporary data during the execution of a program. What is a Local Variable? Local variables are declared in methods, constructors, or blocks. Local variables are created when the method, constructor, or block is entered and the variable will be destroyed once it exits the method, constructor, or block. A local variable is a variable that is − Declared inside ...
Read MoreJava ResultSetMetaData getScale() method with example
In this article, we will learn the ResultSetMetaData getScale() method in Java. The ResultSetMetaData interface provides metadata about the columns in a ResultSet object. The getScale() method returns the number of digits to the right of the decimal point for a specified column. What is the getScale() method? The getScale() method of the ResultSetMetaData (interface) retrieves the number of digits after the right of the decimal point in the given column. This method accepts an integer value representing the index of a column. and returns an integer value representing the number of digits after the decimal in the specified column. Syntax ...
Read MoreJava DatabaseMetaData getDriverName() method with example
In this article, we will learn about the DatabaseMetaData getDriverName() method in Java. The DatabaseMetaData interface provides useful methods to obtain details about the database and the JDBC driver. One such method is getDriverName(), which returns the name of the JDBC driver being used. What is getDriverName() in Java? The getDriverName() method belongs to the DatabaseMetaData interface in Java's JDBC API. It retrieves the name of the JDBC driver currently connected to the database. Syntax String driver_name = metaData.getDriverName(); The method returns the following values − Returns a String representing the name of the ...
Read MoreJava Concurrency – join() method
In this article, we will learn about concurrency in Java. It allows multiple threads to execute simultaneously, sharing system resources efficiently. One of the methods provided in the Thread class for managing thread execution is the join() method. What is the join() Method? the join () function is used to join the beginning of the execution of a thread to the end of the execution of another thread. This way, it is ensured that the first thread won’t run until the second thread has stopped executing. This function waits for a specific number of milliseconds for the thread to terminate. ...
Read MoreJava program to divide a number into smaller random ints
In this article, we will learn to divide a number into smaller random ints in Java. Dividing a number into smaller random integers is a useful technique in various applications such as resource allocation, gaming, and randomization processes Divide a Number into Random Parts The approach relies on generating unique random dividers within the given number and then computing the differences between consecutive dividers to form the final parts. Following are the steps to divide a number into smaller random ints in Java Create a HashSet to ...
Read MoreJava DatabaseMetaData getProcedures() method with example
In this article, we will learn the DatabaseMetaData getProcedures() method in Java. In Java, the DatabaseMetaData.getProcedures() method is used to retrieve information about stored procedures available in a database. What is getProcedures()? The getProcedures() method of the DatabaseMetaData interface returns a ResultSet containing metadata about stored procedures available in a database. This allows developers to query the database for procedure names, catalog information, procedure types, and specific names. Syntax ResultSet procedures = metaData.getProcedures(null, null, "myprocedure"); This method retrieves the description of the stored procedures of a database/catalog. It accepts 3 parameters − catalog: The catalog name ...
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