Challenge 237 solutions by Packy Anderson

Solutions in:
 * Perl
 * Raku
 * Python
 * Java

One blog post.

1 files changed, 108 insertions, 0 deletions

diff --git a/challenge-237/packy-anderson/java/Ch1.java b/challenge-237/packy-anderson/java/Ch1.java
new file mode 100644
index 0000000000..2a9ab8dc49
--- /dev/null
+++ b/challenge-237/packy-anderson/java/Ch1.java
@@ -0,0 +1,108 @@
+import java.util.Calendar;  
+import java.text.SimpleDateFormat;
+
+class seizeTheDay {
+  public int    day;
+  public String description;
+
+  public seizeTheDay(
+    int year,
+    int month,
+    int weekday_of_month,
+    int day_of_week
+  ) {
+    // object for the first day of the specified month
+    Calendar t = Calendar.getInstance();
+    t.set(year, month - 1, 1);
+
+    // find the FIRST instance of the desired day of the week
+    while (t.get(Calendar.DAY_OF_WEEK) != day_of_week+1) {
+      t.add(Calendar.DATE, 1);
+    }
+
+    String month_str =
+      new SimpleDateFormat("MMM").format(t.getTime());
+    String dow_str =
+      new SimpleDateFormat("EEE").format(t.getTime());
+    int count = 1;
+
+    // now roll forward through the month until the desired
+    // weekday of the month
+    while (
+      // we're still in the desired month
+      t.get(Calendar.MONTH) == month - 1
+      && 
+      // we haven't reached the desired weekday of the month
+      count < weekday_of_month
+    ) {
+      t.add(Calendar.DATE, 7);
+      count++;
+    }
+    if (t.get(Calendar.MONTH) != month - 1) {
+      this.day = 0;
+      this.description = String.format(
+        "There isn't a %s %s in %s %d",
+        this.ord_suffix(weekday_of_month),
+        dow_str,
+        month_str,
+        year
+      );
+    }
+    else {
+      this.day = t.get(Calendar.DATE);
+      this.description = String.format(
+        "The %s %s of %s %d is the %s",
+        this.ord_suffix(weekday_of_month),
+        dow_str,
+        month_str,
+        year,
+        this.ord_suffix(this.day)
+      );
+    }
+  }
+
+  private String ord_suffix(int num) {
+    // quick function to add an ordinal suffix
+    // to a number
+    if (num == 11 || num == 12 | num == 13) {
+      return num + "th";
+    }
+    else {
+      switch (num % 10) {
+        case 1:  return num + "st";
+        case 2:  return num + "nd";
+        case 3:  return num + "rd";
+        default: return num + "th";
+      }
+    }
+  }
+}
+
+public class Ch1 {
+  public static void solution(
+    int year,
+    int month,
+    int weekday_of_month,
+    int day_of_week
+  ) {
+    String format = "Input: Year = %d, Month = %d, "
+                  + "Weekday of month = %d, day of week = %d";
+    System.out.println(String.format(
+      format, year, month, weekday_of_month, day_of_week
+    ));
+    seizeTheDay d = new seizeTheDay(year, month, weekday_of_month, day_of_week);
+    System.out.println(String.format("Output: %d", d.day));
+    System.out.println(String.format("\n%s", d.description));
+  }
+
+  public static void main(String[] args) {
+    System.out.println("Example 1:");
+    solution(2024, 4, 3, 2);
+
+    System.out.println("\nExample 2:");
+    solution(2025, 10, 2, 4);
+
+    System.out.println("\nExample 3:");
+    solution(2026, 8, 5, 3);
+  }
+}