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Browse Courses✅ How to Display Text with printf in Java Basic Syntax System.out.printf(formatString, arguments); formatString contains text with format specifiers. arguments are values you want to insert into the text. Common Format Specifiers Specifier Meaning Example %s String “Hello %s” %d Integer “Number: %d” %f Floating-point number “Price: %.2f” %n New line (platform independent) 🔢 […]
Accint. Test. Java Here’s a simple example and explanation of how to create and test Account objects in Java using a class named AccountTest. This example shows how to initialize Account objects when they are created. ✅ 1. Account Class This class represents a simple bank account with a name and balance. java CopyEdit public […]
Divided by zero 1. What is Division by Zero in Java? Integer division by zero (e.g., 10 / 0) causes an error. Java throws: ArithmeticException: / by zero ❌ 2. Without Handling (Bad Way) java CopyEdit int a = 10; int b = 0; int result = a / b; // Error: / by zero […]
Divided by zero with exception handling Steps to Handle Division by Zero in Java 1. Use try block Put the code that might throw an exception (like division) inside the try block. 2. Use catch block Catch the specific exception: ArithmeticException for divide by zero. 3. Optional: finally block This runs no matter what—used […]
To print a line of text in Java, you can use the System.out.println() statement. ✅ Example: java CopyEdit public class HelloWorld { public static void main(String[] args) { System.out.println(“Hello, this is a printed line in Java!”); } } 🔍 Explanation: System: A built-in class in Java. out: A static member of System, representing the output […]
TRANSFORMATIONS In a plane, you can slide, flip, turn, enlarge, or reduce figures to create new figures. These corresponding figures are frequently designed into wallpaper borders, mosaics, and artwork. Each figure that you see will correspond to another figure. These corresponding figures are formed using transformations. A transformation maps an initial image, called a preimage, […]
Hadoop has an abstract notion of filesystems, of which HDFS is just one implementation. The Java abstract class org.apache.hadoop.fs.FileSystem represents the client interface to a filesystem in Hadoop, and there are several concrete implementations. The main ones that ship with Hadoop are described in Table . Interfaces HTTP HTTP By exposing its filesystem interface as […]
Hadoop comes with a distributed filesystem called HDFS, which stands for Hadoop Distributed Filesystem. The Design of HDFS HDFS is a filesystem designed for storing very large files with streaming data access patterns, running on clusters of commodity hardware. Very large files “Very large” in this context means files that are hundreds of megabytes, gigabytes, […]
Scaling Out Map Reduce works for small inputs; now it’s time to take a bird’s-eye view of the system and look at the data flow for large inputs. For simplicity, the examples so far have used files on the local filesystem. However, to scale out, we need to store the data in a distributed filesystem […]
To take advantage of the parallel processing that Hadoop provides, we need to expe our query as a MapReduce job. After some local, small-scale testing, we will be able to run it on a cluster of machines. MapReduce Map and Reduce MapReduce works by breaking the processing into two phases: the map phase and the […]
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