From 67e31dba87a37fdf8ea454db296b4c105033eef0 Mon Sep 17 00:00:00 2001
From: Xi Xu <i@xi-xu.me>
Date: Mon, 22 Apr 2024 23:27:46 +0800
Subject: [PATCH] add package ticket

---
 ticket/Test.java         | 29 ++++++++++++++++
 ticket/TicketSeller.java | 74 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100644 ticket/Test.java
 create mode 100644 ticket/TicketSeller.java

diff --git a/ticket/Test.java b/ticket/Test.java
new file mode 100644
index 0000000..503ccec
--- /dev/null
+++ b/ticket/Test.java
@@ -0,0 +1,29 @@
+package ticket;
+
+import java.util.Scanner;
+
+public class Test {
+    public static void main(String[] args) {
+        TicketSeller ts = new TicketSeller(1, 1, 1, 1, 1);
+        String name;
+        int payment;
+        boolean continueBuy = true;
+        Scanner sc = new Scanner(System.in);
+        while (continueBuy) {
+            System.out.print("Please enter your name: ");
+            name = sc.next();
+            System.out.print("Please enter your payment: ");
+            payment = sc.nextInt();
+            Thread consumer = new Thread(ts, name + "-" + payment);
+            consumer.start();
+            try {
+                consumer.join();
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            System.out.println("Do you want to continue buying tickets? Y: Yes, N: No");
+            continueBuy = sc.next().equalsIgnoreCase("Y");
+        }
+        sc.close();
+    }
+}
\ No newline at end of file
diff --git a/ticket/TicketSeller.java b/ticket/TicketSeller.java
new file mode 100644
index 0000000..8faa684
--- /dev/null
+++ b/ticket/TicketSeller.java
@@ -0,0 +1,74 @@
+package ticket;
+
+public class TicketSeller implements Runnable {
+    private int five, ten, twenty, fifty, hundred;
+
+    public TicketSeller(int five, int ten, int twenty, int fifty, int hundred) {
+        this.five = five;
+        this.ten = ten;
+        this.twenty = twenty;
+        this.fifty = fifty;
+        this.hundred = hundred;
+    }
+
+    @Override
+    public synchronized void run() {
+        String threadName = Thread.currentThread().getName();
+        String[] threadNameArr = threadName.split("-");
+        String userName = threadNameArr[0];
+        int payment = Integer.valueOf(threadNameArr[1]);
+        boolean success = false;
+        while (!success) {
+            switch (payment) {
+                case 5:
+                    five++;
+                    success = true;
+                    break;
+                case 10:
+                    if (five > 0) {
+                        five--;
+                        ten++;
+                        success = true;
+                    }
+                    break;
+                case 20:
+                    if (ten > 0 && five > 0) {
+                        ten--;
+                        five--;
+                        twenty++;
+                        success = true;
+                    } else if (five >= 3) {
+                        five -= 3;
+                        twenty++;
+                        success = true;
+                    }
+                    break;
+                case 50:
+                    if (ten > 0 && five > 0) {
+                        ten--;
+                        five--;
+                        fifty++;
+                        success = true;
+                    } else if (five >= 3) {
+                        five -= 3;
+                        fifty++;
+                        success = true;
+                    }
+                    break;
+                default:
+                    throw new IllegalArgumentException("Invalid payment amount!");
+            }
+            if (!success) {
+                System.out.println(userName + ": Unable to get change, ticket purchase failed, waiting!");
+                try {
+                    wait();
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+            } else {
+                System.out.println(userName + ": Ticket purchase successful!");
+                notifyAll();
+            }
+        }
+    }
+}
\ No newline at end of file