From 14c5ef09f5448333fb82a3252fd09f50fedf37ae Mon Sep 17 00:00:00 2001
From: Alexander Bachinger <alexander@bachinger.org>
Date: Tue, 13 May 2025 11:29:45 +0200
Subject: [PATCH] vor GPT

---
 src/UE21_290425_Bruecke/Car.java       | 22 +++++++++-
 src/UE21_290425_Bruecke/Generator.java | 24 +++++++++--
 src/UE21_290425_Bruecke/Guard.java     | 58 +++++++++++++++++++-------
 3 files changed, 86 insertions(+), 18 deletions(-)

diff --git a/src/UE21_290425_Bruecke/Car.java b/src/UE21_290425_Bruecke/Car.java
index 246de0e..e822dcd 100644
--- a/src/UE21_290425_Bruecke/Car.java
+++ b/src/UE21_290425_Bruecke/Car.java
@@ -1,5 +1,25 @@
 package UE21_290425_Bruecke;
 
-public class Car {
+import java.time.LocalTime;
 
+public class Car extends Thread {
+    private static final int crossingTime = 50_000;
+    LocalTime arrivingTime;
+    Guard guard;
+
+    public Car(Guard guard) {
+        this.guard = guard;
+        this.arrivingTime = LocalTime.now();
+    }
+
+    @Override
+    public void run() {
+        try {
+            Thread.sleep(crossingTime);
+            guard.leaving();
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+
+    }
 }
diff --git a/src/UE21_290425_Bruecke/Generator.java b/src/UE21_290425_Bruecke/Generator.java
index 4b11bba..75b4b37 100644
--- a/src/UE21_290425_Bruecke/Generator.java
+++ b/src/UE21_290425_Bruecke/Generator.java
@@ -1,8 +1,26 @@
 package UE21_290425_Bruecke;
 
-public class Generator {
-    public static void main(String[] args) {
-        Guard guard = new Guard();
+public class Generator extends Thread {
+    public static boolean RESUME = true;
+    private static Guard guard = new Guard();
+    private static Generator generator = new Generator();
 
+    public static void main(String[] args) {
+        generator.start();
+        guard.start();
+    }
+
+    @Override
+    public void run() {
+        while (Generator.RESUME) {
+            try {
+                Thread.sleep((int) (Math.random() * 5 + 1) * 1000L);
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+            Car car = new Car(guard);
+            guard.arriving(car);
+            System.out.println(guard);
+        }
     }
 }
diff --git a/src/UE21_290425_Bruecke/Guard.java b/src/UE21_290425_Bruecke/Guard.java
index f350cd3..a132c39 100644
--- a/src/UE21_290425_Bruecke/Guard.java
+++ b/src/UE21_290425_Bruecke/Guard.java
@@ -5,28 +5,58 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
-public class Guard {
-    private static final List<Car> waitingCars = new ArrayList<>();
-    private static final Set<Integer> waitingTimes = new HashSet<>();
-    private static int carsOnBridge = 0;
+public class Guard extends Thread {
+    private List<Car> waitingCars = new ArrayList<>();
+    private Set<Integer> waitingTimes = new HashSet<>();
+    private int carsOnBridge = 0;
 
-    public static void arriving(Car car) {
-        waitingCars.add(car);
+    public synchronized void leaving() {
+        this.carsOnBridge--;
     }
 
-    public static void leaving() {
-        carsOnBridge--;
+    public synchronized void arriving(Car car) {
+        System.out.println("add");
+        this.waitingCars.add(car);
+        System.out.println(this.waitingCars.size());
     }
 
-    public void crossing(Car car) throws InterruptedException {
-        carsOnBridge++;
-        waitingCars.remove(car);
-        Thread.sleep(50_000);
-        leaving();
+    public synchronized void crossing(Car car) {
+        System.out.println("crossing");
+        this.carsOnBridge++;
+        this.waitingCars.remove(car);
+        car.start();
     }
 
     @Override
     public String toString() {
-        return "Statistics:\n" + "waiting: " + waitingCars + "waitingTimes: " + waitingTimes + "carsOnBridge: " + carsOnBridge;
+        StringBuilder output = new StringBuilder("""
+                Statistics:
+                waiting:\s
+                """);
+        for (int i = 0; i < waitingCars.size(); i++) {
+            output.append("Car").append(i).append(": \t");
+            output.append(waitingCars.get(i).arrivingTime.getHour());
+            output.append(":").append(waitingCars.get(i).arrivingTime.getMinute());
+            output.append(":").append(waitingCars.get(i).arrivingTime.getSecond()).append("\n");
+        }
+        output
+//                .append("waitingTimes: ").append(waitingTimes)
+                .append("carsOnBridge: ").append(carsOnBridge);
+        return output.toString();
+    }
+
+    @Override
+    public void run() {
+        while (Generator.RESUME) {
+//                if (waitingCars.isEmpty()) continue;
+            if (this.carsOnBridge < 10) {
+//                    System.out.println("<10");
+//                    System.out.println(waitingCars.size());
+                if (!this.waitingCars.isEmpty()) {
+                    System.out.println("crossing");
+                    crossing(this.waitingCars.getFirst());
+                }
+            }
+        }
     }
 }