update,

it114105/itp4510/Lab01/Lab1.2/q1/Drink.java

@@ -0,0 +1,19 @@
+public class Drink extends Food {
+    protected int volume;
+
+    public Drink(String name, int price, int volume) {
+        super(name, price);
+        this.volume = volume;
+    }
+
+    public void setPrice(int price) {
+        if (price < 5)
+            this.price = 5;
+        else
+            this.price = price;
+    }
+
+    public String toString() {
+        return super.toString() + ", volume=" + volume;
+    }
+}