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Java Articles
Page 169 of 450
Java 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 ...
Read MoreJava program to pass lambda expression as a method argument
In this article, we will learn to pass a lambda expression as a method argument in Java. A lambda expression is a short block of code that takes in parameters and returns a value. Lambda Expression Lambda expressions allow passing functionality as a method parameter, reducing the need for anonymous classes. They are often used in functional interfaces, especially when working with collections and streams. Problem Statement Given an Arraylist the goal is to reverse the strings present in it. Below is a demonstration of the same − Input ("Apple", "Orange", "Grapes") Output elppA, egnarO, separG Reversing Strings in ...
Read MoreJava ResultSetMetaData getColumnLabel() method with example
In this article, we will learn the ResultSetMetaData getColumnLabel() method in Java. When working with databases in Java, the ResultSetMetaData interface provides valuable information about the structure of a ResultSet, such as column names, types, and properties. What is getColumnLabel()? The getColumnLabel() method of the ResultSetMetaData (interface) retrieves the display name of a particular column. This method accepts an integer value representing the index of the column in the current ResultSet object, as an argument. Syntax − String columnLabel = resultSetMetaData.getColumnLabel(); Parameters: The index of the column (starting from 1). Returns: A ...
Read MoreJava program to cube sum of first n natural numbers
In this article, we will learn to write a Java program to calculate the sum of cubes of the first n natural numbers. Understanding the Cube Sum Formula The sum of cubes of the first n natural numbers follows a mathematical formula − S = 13 + 23 + 33 + ... + n3 = { ( n ( n + 1 ) ) / 2 }2 Different Approaches Following are the two different approaches to printing the cube sum of first n natural numbers − Using a Loop Using a ...
Read MoreJava DatabaseMetaData getIndexInfo() method with example
In this article, we will learn about the DatabaseMetaData getIndexInfo() method with an example in Java. This is useful when you need to understand the display information of a table in a result set using the indexes. DatabaseMetaData getIndexInfo() method The getIndexInfo() method in Java’s DatabaseMetaData interface retrieves information about indexes for a specified table in a database. This method is useful for understanding the structure and performance of a database table, particularly for optimization and query tuning. Syntax ResultSet rs = metaData.getIndexInfo("example_database", null, "sample_table", false, false); This method retrieves the description of the indices of a table. It accepts ...
Read MoreJava Program to determine a Character\'s Unicode Block
In this article, we will learn to represent the Unicode block containing the given character in Java. Unicode provides a standardized way to represent characters from various writing systems across the world. In Java, characters belong to different Unicode Blocks, which help in categorizing them based on language, symbols, and special characters. Understanding Unicode Blocks A Unicode Block is a range of Unicode characters grouped together based on similar properties.For example: Basic Latin (U+0000 to U+007F) contains English letters and symbols. CJK Unified Ideographs (U+4E00 to U+9FFF) contains Chinese, Japanese, and ...
Read MoreJava Program to remove the last row from a table with DefaultTableModel
In this article, we will learn to remove the last row from a table with DefaultTableModel in Java. Managing table data dynamically is a common requirement when working with Java Swing applications. One such operation is removing the last row from a JTable using DefaultTableModel. Understanding DefaultTableModel in Java DefaultTableModel is a flexible table model in Java's Swing library that allows developers to dynamically manage table data, including adding and removing rows and columns. Provides built-in methods for adding and removing rows easily. Approach to Removing the Last Row In this program, we create a table with multiple rows and ...
Read MoreJava program to check whether the number is divisible by 5
In mathematics, the divisibility rule of 5 states that if the number ends with 0 or 5 then it will divisible by 5. There is another way to identify the divisibility rule of 5, if the remainder comes to 0 it returns the number is divisible by 5. The mod(%) operator is normally used in programming when it comes to divisibility. Following are some examples which helps you to understand the divibility rule of 5 − Given number is 525, the number ends with 5 and it is divisible by 5. Given number is 7050, the number ends with ...
Read MoreJava API documentation generator
In this article, we will learn about Java API documentation generators. Java API documentation generators automate the process of creating structured and readable documentation for Java projects, making it easier for developers to understand and use APIs. What is a Java API Documentation Generator? A Java API documentation generator is a tool that analyzes Java source code and generates documentation in a structured format, typically HTML, XML, or Markdown. These tools extract comments and annotations from the code and transform them into comprehensive references for developers. Different Java API Documentation Generators The Following are Popular Java API documentation generators − ...
Read MoreJava Program to fill elements in a float array
In this article, we will learn how to fill elements in a float array in Java. The Arrays.fill() method is used to assign a specified value to each element of the array. Array fill() method The Arrays.fill() method in Java sets all elements of an array to a given value, making it useful for quickly initializing or resetting arrays. The Arrays.fill() method works with various data types like int, char, double, and boolean. It makes it easy to fill arrays with a default or specific value. Syntax Arrays.fill(array, value)Arrays.fill(array, start, end, value) ...
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