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Heap sort

0 likes • Nov 19, 2022 • 0 views
Java
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LeetCode #21: Merge Two Sorted Lists

0 likes • Oct 15, 2022 • 0 views
Java
public class Solution {
public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
ListNode head = new ListNode(0);
ListNode handler = head;
while(l1 != null && l2 != null) {
if (l1.val <= l2.val) {
handler.next = l1;
l1 = l1.next;
} else {
handler.next = l2;
l2 = l2.next;
}
handler = handler.next;
}
if (l1 != null) {
handler.next = l1;
} else if (l2 != null) {
handler.next = l2;
}
return head.next;
}
}

Random Integers -> file

0 likes • Nov 19, 2022 • 0 views
Java
//sample code to write 100 random ints to a file, 1 per line
import java.io.PrintStream;
import java.io.IOException;
import java.io.File;
import java.util.Random;
public class WriteToFile {
public static void main(String[] args) {
try {
PrintStream writer = new PrintStream(new File("randInts.txt"));
Random r = new Random();
final int LIMIT = 100;
for (int i = 0; i < LIMIT; i++) {
writer.println(r.nextInt());
}
writer.close();
} catch (IOException e) {
System.out.println("An error occured while trying to write to the file");
}
}
}

Factorial

0 likes • Nov 19, 2022 • 0 views
Java
public class Factorial
{
public static void main(String[] args)
{ final int NUM_FACTS = 100;
for(int i = 0; i < NUM_FACTS; i++)
System.out.println( i + "! is " + factorial(i));
}
public static int factorial(int n)
{ int result = 1;
for(int i = 2; i <= n; i++)
result *= i;
return result;
}
}

try-catch modularity

0 likes • Jan 31, 2023 • 0 views
Java
public class UserService {
private UserRepository userRepository;
public UserService(UserRepository userRepository) {
this.userRepository = userRepository;
}
public User getUserById(long id) {
try {
return userRepository.getUserById(id);
} catch (Exception e) {
// Log the exception here
System.out.println("An error occurred while fetching the user: " + e.getMessage());
return null;
}
}
}
public class UserRepository {
public User getUserById(long id) throws Exception {
// Database query to fetch the user
if (id < 0) {
throw new Exception("Invalid user id");
}
// Return the user object
return new User(id, "John Doe");
}
}
public class User {
private long id;
private String name;
public User(long id, String name) {
this.id = id;
this.name = name;
}
public long getId() {
return id;
}
public String getName() {
return name;
}
}

Me

0 likes • Feb 6, 2021 • 0 views
Java
public class Daedalus extends Athenian
{
private Story story;
public ArrayList<Skill> skills = new ArrayList<Skill>();
public ArrayList<Athenian> children = new ArrayList<Athenian>();
public Daedalus(Story story, ArrayList<Skill> inherentSkills)
{
if(story != null)
System.out.println("ERROR No one is created with a story.");
skills.add(inherentSkills);
}
public Momento advanceStory(Scene s)
{
System.err.println("ERROR Don't know how to proceed...");
}
}
//██╗  ░█████╗░███╗░░░███╗  ██████╗░░█████╗░███████╗██████╗░░█████╗░██╗░░░░░██╗░░░██╗░██████╗
//██║  ██╔══██╗████╗░████║  ██╔══██╗██╔══██╗██╔════╝██╔══██╗██╔══██╗██║░░░░░██║░░░██║██╔════╝
//██║  ███████║██╔████╔██║  ██║░░██║███████║█████╗░░██║░░██║███████║██║░░░░░██║░░░██║╚█████╗░
//██║  ██╔══██║██║╚██╔╝██║  ██║░░██║██╔══██║██╔══╝░░██║░░██║██╔══██║██║░░░░░██║░░░██║░╚═══██╗
//██║  ██║░░██║██║░╚═╝░██║  ██████╔╝██║░░██║███████╗██████╔╝██║░░██║███████╗╚██████╔╝██████╔╝
//╚═╝  ╚═╝░░╚═╝╚═╝░░░░░╚═╝  ╚═════╝░╚═╝░░╚═╝╚══════╝╚═════╝░╚═╝░░╚═╝╚══════╝░╚═════╝░╚═════╝░

Add Binary Numbers

0 likes • Oct 15, 2022 • 0 views
Java
public static String addBinary(){
// The two input Strings, containing the binary representation of the two values:
String input0 = "1010";
String input1 = "10";
// Use as radix 2 because it's binary
int number0 = Integer.parseInt(input0, 2);
int number1 = Integer.parseInt(input1, 2);
int sum = number0 + number1;
return Integer.toBinaryString(sum); //returns the answer as a binary value;
}