Page 28-Java Programming Tutorials: Learn Java Online-php.cn

Article Tags

Home

Technical Articles

Java

Minimum number of jumps to reach end using Java

This Java code calculates the minimum jumps needed to traverse an array, where each element represents the maximum jump distance from that position. Let's explore the algorithm and code step-by-step. The goal is to find the fewest jumps required to

Feb 07, 2025 pm 12:02 PM

Java

ConcurrentModificationException in Java with Examples

In a Java multithreaded environment, if the method encounters concurrent modification during resource detection, a ConcurrentModificationException may be thrown. At this time, the object is in a non-modified state. Here is an example of a ConcurrentModificationException exception: Exception in thread "main" java.util.ConcurrentModificationException at java.base/java.util.ArrayList$Ittr.check

Feb 07, 2025 pm 12:01 PM

Java

Send SMS Alert to saved contact in Java

Steps to Send SMS Reminders in Java This article will explore how to use Java to send SMS reminders to saved contacts. We will guide you how to use Java to send SMS reminders to saved or unsaved contacts. The specific steps are as follows: Set up an account at the SMS provider. Add the provider's Java library to your project. Write Java code to send text messages. Let us elaborate on the above steps in detail. Set up an account First, we need to set up an account in any messaging API (e.g. Twilio). Create a Twilio Account Register an account. Get the credentials and once you have an account you will have an account SID and AUTH TOKEN. You need this information to verify

Feb 07, 2025 pm 12:00 PM

Java

Java Program to insert an element at the Bottom of a Stack

A stack is a data structure that follows the LIFO (Last In, First Out) principle. In other words, The last element we add to a stack is the first one to be removed. When we add (or push) elements to a stack, they are placed on top; i.e. above all the

Feb 07, 2025 am 11:59 AM

Java

Compressing and Decompressing files in Java

This article explores file compression and decompression in Java, focusing on the DeflaterOutputStream and InflaterInputStream classes for deflate compression. These classes offer efficient ways to handle compressed data. Core Concepts: Java provide

Feb 07, 2025 am 11:56 AM

Java

Length of longest balanced parentheses prefix using Java

This article explains how to use Java to find the longest balanced parentheses prefix length. First, we will understand the problem using several examples and then learn two different approaches to seek it. Explanation of the problem Here we give a string containing parentheses and we need to find the length of the balanced set of parentheses from the string. In other words, if there are all the opening parentheses "(" close parentheses")", then we call them balanced. The prefix is a balun from the beginning of a string

Feb 07, 2025 am 11:55 AM

Java

Maximum Subarray Sum in Java: Kadane's Algorithm

Let's learn how to efficiently find the maximum subarray sum using Kadane's Algorithm in Java. Problem Statement: Given an array of size N, write a Java program to determine the maximum sum of a contiguous subarray using Kadane's Algorithm. Example:

Feb 07, 2025 am 11:54 AM

Java

Difference between Parallel and Sequential Streams in Java

Java 8 introduces Stream, which is located in the java.util.stream package. Stream is a sequence of objects, similar to an array or collection, and supports a variety of methods and aggregation operations, including filtering, mapping, reduction, limiting, matching, and finding. . These operations do not modify the original data source, but create a new Stream for processing. Streams are mainly divided into two types: Sequential Stream and Parallel Stream. This article will focus on the two

Feb 07, 2025 am 11:53 AM

Java

Difference Between InputStream and OutputStream in Java

Java's InputStream and OutputSteam are both abstract classes that are used to access the underlying dataset. They are APIs that define operations for specific data sequences, implemented through a series of steps. InputStream Rearranges the dataset into an ordered byte stream, reading data from a file or network. Returns -1 at the end of the stream (Java does not have unsigned byte data type). OutputStream then receives the output bytes and writes them to the target. It is the most basic method of writing a single byte output. This article will compare the differences between these two streams and explain them in combination with practical applications. Input Example FileOutputStream fileOut =

Feb 07, 2025 am 11:52 AM

Java

Java program to iterate over arrays using for and foreach loop

Java offers two primary methods for iterating through arrays: the traditional for loop and the enhanced for-each loop. Both efficiently process array elements, but their applications differ slightly. This article demonstrates how to use each loop ty

Feb 07, 2025 am 11:51 AM

Java

Compiler Class In Java

Understanding the Java Compiler Class In Java, native code refers to code executable within the Java Virtual Machine (JVM). The Compiler class facilitates the conversion of Java code into native code. It's a public class residing within the java.la

Feb 07, 2025 am 11:50 AM

Java

Initializing multiple variables to the same value in Java

This article will explain how to initialize multiple variables to the same value in Java. What are variables? A variable is a name given to the space reserved in memory. Each variable has a type that specifies the type of data it holds. Initialize multiple variables to the same value Multiple variables can be initialized to the same value using the following statement: variable1 = variable2 = variable3 = value; This means assigning the value to variable3, then assigning variable3 to variable2, and finally assigning variable2 to variable1. Example 1 int a = b

Feb 07, 2025 am 11:49 AM

Java

Can an int be null in Java?

The int type in Java cannot be null. int is the basic data type in Java, its default value is 0, and it cannot be assigned as null. Other basic data types (such as float, double, etc.) also follow the same rules. Unlike basic data types, objects in Java can be null. There is no concept of null reference for basic data types. Example: An error will be reported when trying to assign null to an int variable The following code throws a compile-time error: int myInt = null; How to assign null values to integer variables? If you need a variable that can represent a null value, you can use the Integer class. Integer is an int package

Feb 07, 2025 am 11:48 AM

Java

Difference between List, Set, and Map in Java

Java's java.util package provides the Collection interface, which branches into several sub-interfaces and classes, including List, Set, and Map. This article clarifies the distinctions between these three core data structures. Understanding the List

Feb 07, 2025 am 11:47 AM

Java