Ejemplos de Código Java para Tareas Comunes

Posted by on Apr 22, 2025 in Computer Engineering | 0 comments

Método para Invertir una Cadena en Java

Este método toma una cadena de texto y devuelve una nueva cadena con los caracteres en orden inverso.


public String invertirCadena(String s) {
    String resultado = "";
    if (s == null) {
        return null; // O manejar como se prefiera
    }
    for (int i = s.length() - 1; i >= 0; i--) {
        resultado = resultado + s.charAt(i);
    }
    return resultado;
}

Método para Invertir un Array en Java

Este método invierte los elementos de un array

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Data Communication Concepts and Transmission Methods

Posted by on Apr 19, 2025 in Computer Engineering | 0 comments

Data Communication Fundamentals

Core Concepts in Data Communication

Data Communication: The process of communicating information in binary form between two or more points. It requires four basic elements:

  • Transmitter: A device that transmits data.
  • Message: The data to be transmitted.
  • Medium: The path data takes from source to destination.
  • Receiver: The device receiving the data.

Bit: The smallest unit of information and the base unit for communications.

Byte: The minimum continuous set of bits that enables

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Networking Essentials: LAN, WAN, and Data Transmission

Posted by on Apr 5, 2025 in Computer Engineering | 0 comments

Networking Fundamentals

LAN vs. WAN

LAN (Local Area Network): Local networking, typically found in homes, businesses, or schools, and geographically limited. It is owned by an independent organization.

WAN (Wide Area Network): Covers a large geographical area and is typically used by service providers.

Network Infrastructure

Hardware: Routers, switches, NICs (Network Interface Cards)

Software: Network operating/management systems, operating systems, firewalls, network security applications

Services: T-

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Java Concepts: Practice Questions and Examples

Posted by on Apr 4, 2025 in Computer Engineering | 0 comments

Java Concepts: Practice Questions

  • Primitive data type variables cannot be used to invoke methods.
  • Import statements are not needed if one class in a package uses another in the same package.
  • Classes declared as final cannot be subclassed.
  • Methods in an abstract class do not have to be abstract.
  • Static/private methods cannot be overridden.

Data Type Conversion

  • String to int: int result = Integer.parseInt(string);

Threads

Create and start a thread that checks if an integer is even (divisible by 2):

  • new Thread(
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Pathfinding Algorithms: BFS, DFS, A*, and Uniform Cost

Posted by on Apr 4, 2025 in Computer Engineering | 0 comments

Breadth-First Search (BFS) and Depth-First Search (DFS)

from collections import deque
def bfs(maze, start, end):
  rows = len(maze)
  cols = len(maze[0])
  directions = [(0, 1), (1, 0), (0, -1), (-1, 0)]
  queue = deque([(start, [start])])
  visited = set()
  visited.add(start)
  node_visited = 0
  while queue:
    current, path = queue.popleft()
    node_visited += 1
    if current == end:
      return path, node_visited
    for r, c in directions:
      x = current[0] + r
      y = current[
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C Language Stack Implementation and Applications

Posted by on Apr 4, 2025 in Computer Engineering | 0 comments

C Code: Checking Parentheses Correctness

#include <stdio.h>
#include <string.h>

#define N 20

typedef struct stack {
    int a[N];
    int top;
} stack;

void push(stack *s, int x) {
    s->top++;
    s->a[s->top] = x;
}

int pop(stack *s) {
    int x;
    x = s->a[s->top];
    s->top--;
    return x;
}

int isOpenBracket(int x) {
    if (x == '{' || x == '[' || x == '(') {
        return 1;
    } else {
        return 0;
    }
}

int isCloseBracket(int x) {
    if
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