Week 175 Task 1 Java Solution

1 files changed, 53 insertions, 0 deletions

diff --git a/challenge-175/cheok-yin-fung/java/LastSunday.java b/challenge-175/cheok-yin-fung/java/LastSunday.java
new file mode 100644
index 0000000000..50b6432412
--- /dev/null
+++ b/challenge-175/cheok-yin-fung/java/LastSunday.java
@@ -0,0 +1,53 @@
+// The Weekly Challenge 175
+// Task 1 Last Sunday
+
+import java.time.LocalDate;
+
+public class LastSunday
+{
+
+    public static void main(String[] args)
+    {
+        int year = Integer.parseInt(args[0]);
+        for (String date_str : last_sun_year(year))
+        {
+            System.out.println(date_str);
+        }
+    }
+
+    public static LocalDate last_sun_month (int yr, int month)
+    {
+        LocalDate temp = LocalDate.of(yr,month+1,1);
+        return temp.minusDays(gd(temp));
+    }
+
+    public static String[] last_sun_year(int yr) 
+    {
+        String[] ans = new String[12];
+        for (int i = 1; i<=11; i++) 
+        {
+            ans[i-1] = last_sun_month(yr,i).toString();
+        }
+        LocalDate temp = LocalDate.of(yr+1,1,1);
+        ans[11] = temp.minusDays(gd(temp)).toString();
+        return ans;
+    }
+
+    public static int gd(LocalDate date)
+    {
+        var a = date.getDayOfWeek();
+        switch(a)
+        {
+            case MONDAY: return 1;
+            case TUESDAY: return 2;
+            case WEDNESDAY: return 3;
+            case THURSDAY: return 4;
+            case FRIDAY: return 5;
+            case SATURDAY: return 6;
+            case SUNDAY: return 7;
+        }
+        return 0;
+    }
+
+
+}