add package ticket

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();
+            }
+        }
+    }
+}