Advent of Code 2023 Day 1 Part 1 solution

2023/day01/src/main/java/work/zoner/day01/Day01.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2023 fen
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package work.zoner.day01;
+
+import java.io.IOException;
+import java.nio.file.Paths;
+import java.util.Scanner;
+/**
+ *
+ * @author fen
+ */
+public class Day01 {
+    
+    public static boolean isNumeric(String str) {
+        return str.matches("-?\\d+(\\.\\d+)?");  //match a number with optional '-' and decimal.
+    }
+    
+    public static void main(String args[]) {
+        int totalVal = 0;
+        try (Scanner inputReader = new Scanner(Paths.get("./input"))) {
+                while (inputReader.hasNext()) {
+                    String tmpString = new String();
+                    int[] calVals = new int[2];
+                    tmpString = inputReader.nextLine();
+                    
+                    for(int i = 0; i < tmpString.length(); i++) {
+                        if (isNumeric(""+tmpString.charAt(i))) {
+                            calVals[0] = Integer.parseInt(tmpString.charAt(i)+"");
+                            break;
+                        }
+                    }
+                    
+                    for(int i = tmpString.length()-1; i > -1; i--) {
+                        if (isNumeric(""+tmpString.charAt(i))) {
+                            calVals[1] = Integer.parseInt(tmpString.charAt(i)+"");
+                            break;
+                        }
+                    }
+                    
+                    //System.out.printf("%d%d%n",calVals[0],calVals[1]); testing outputs
+                    totalVal += (calVals[0]*10) + calVals[1];
+                }
+        } catch (IOException e) {
+            System.out.print("File error");
+        }
+        System.out.println(totalVal);
+    }
+}