feat: create classes

.gitignore

@@ -1,2 +1,3 @@
 
 Lab1.pdf
+*.class

Customer.java

@@ -0,0 +1,13 @@
+public class Customer {
+    final private int id;
+
+    public Customer(int id) {
+        this.id = id;
+    }
+
+    @Override
+    public String toString() {
+        return "Customer " + id;
+    }
+
+}

Shop.java

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+public class Shop {
+    private ShopCounter[] counters;
+
+    public Shop(ShopCounter[] counters) {
+        this.counters = counters;
+    }
+
+    public ShopCounter getAvailableCounter() {
+        for (int i = 0; i < this.counters.length; i++) {
+            if (this.counters[i].isAvailable())
+                return counters[i];
+        }
+        return null;
+    }
+}

ShopCounter.java

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+public class ShopCounter {
+    final private int id;
+    private boolean available;
+
+    public boolean isAvailable() {
+        return available;
+    }
+
+    public void setAvailable(boolean available) {
+        this.available = available;
+    }
+
+    public ShopCounter(int id) {
+        this.id = id;
+        this.available = true;
+    }
+
+    @Override
+    public String toString() {
+        return "Counter " + id;
+    }
+
+}