Add project files

.gitignore

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+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/
+target/
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>Renamer</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.xerial</groupId>
+            <artifactId>sqlite-jdbc</artifactId>
+            <version>3.32.3.2</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/io.github.eamonnmcmanus/serialysis -->
+        <dependency>
+            <groupId>io.github.eamonnmcmanus</groupId>
+            <artifactId>serialysis</artifactId>
+            <version>0.9</version>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <release>11</release>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>create-my-bundle</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                        <configuration>
+                            <descriptorRefs>
+                                <descriptorRef>jar-with-dependencies</descriptorRef>
+                            </descriptorRefs>
+                            <archive>
+                                <manifest>
+                                    <mainClass>org.example.Renamer</mainClass>
+                                </manifest>
+                            </archive>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>

src/main/java/org/example/Renamer.java

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+package org.example;
+
+import java.io.File;
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class Renamer
+{
+    
+    /*
+     this simple and inefficient program was made to rename files in a folder that were numbered incorrectly.
+     the files had the correct number in their name, but since most OSes use alphabetical order, it was not like this:
+     1, 2, 3, 4, 5, 6, 7, 8, 9, 10...
+     but like this:
+     1, 10, 11, 12-19, 100, 101, 102... 2, 20, 21-29, 200, 201, 202...
+
+     this is easily fixed by adding zeros before the actual number, up to the number of needed digits:
+     001, 002, 003, 004... 010, 011... 020, 021... 100, 101...
+     */
+
+    public static String path = "D:\\CD 2021\\foto";
+
+    public static void main(String[]args)
+    {
+        Set<String> listaFoto = listFilesUsingJavaIO(path);
+        System.out.println(listaFoto.toString());
+
+        for(String currentFile : listaFoto)
+        {
+            System.out.println("Orig: " +  currentFile);
+            System.out.println("Nums: " + currentFile.replaceAll("[^\\d]", ""));
+
+            String onlyNumbers = currentFile.replaceAll("[^\\d]", "");
+            String everythingElse = currentFile.replaceAll("[\\d]", "");
+            if(onlyNumbers.length() >= 3 || onlyNumbers.length() == 0) continue;
+
+            String newName = "";
+
+            if(onlyNumbers.length() == 2)
+            {
+                System.out.println("size 2");
+                newName = "0" + onlyNumbers;
+            }
+            else
+            if(onlyNumbers.length() == 1)
+            {
+                System.out.println("size 1");
+                newName = "00" + onlyNumbers;
+            }
+            else newName = onlyNumbers;
+
+            newName = newName + everythingElse;
+
+            System.out.println("New: " + newName);
+
+            File original = new File(path + "\\" + currentFile);
+            File destination = new File(path + "\\" + newName);
+
+            original.renameTo(destination);
+
+        }
+
+    }
+
+    public static Set<String> listFilesUsingJavaIO(String dir) {
+        return Stream.of(new File(dir).listFiles())
+                .filter(file -> !file.isDirectory())
+                .map(File::getName)
+                .collect(Collectors.toSet());
+    }
+}