{practice}

TicketMachine.java

@@ -17,12 +17,18 @@ public class TicketMachine
     private int balance;
     // The total amount of money collected by this machine.
     private int total;
-
+    public void prompt() 
+    {
+        System.out.println("Please insert the correct amount of money.");
+    }
+    
+   
     /**
      * Create a machine that issues tickets of the given price.
      * Note that the price must be greater than zero, and there
      * are no checks to ensure this.
      */
+    
     public TicketMachine(int ticketCost)
     {
         price = ticketCost;
@@ -52,7 +58,12 @@ public class TicketMachine
      */
     public void insertMoney(int amount)
     {
-        balance = balance + amount;
+        if (amount >= 0) {
+            balance = balance + amount;
+        }
+        else {
+            System.out.println("Use a positive amount: " + amount);
+        }
     }
 
     /**
@@ -62,6 +73,7 @@ public class TicketMachine
      */
     public void printTicket()
     {
+        if (balance >= price) {
         // Simulate the printing of a ticket.
         System.out.println("##################");
         System.out.println("# The BlueJ Line");
@@ -71,8 +83,21 @@ public class TicketMachine
         System.out.println();
 
         // Update the total collected with the balance.
-        total = total + balance;
-        // Clear the balance.
+        total = total + price;
+        // new balance
+        balance = balance - price;
+    }
+        else {
+            System.out.println("You must insert at least: " + (price - balance) + " cents.");
+        }
+    }
+    
+    //Balance life//
+    public int refundBalance()
+    {
+        int amountToRefund;
+        amountToRefund = balance;
         balance = 0;
+        return amountToRefund;
     }
 }

bluej.pkg

@@ -1,18 +1,18 @@
 #BlueJ package file
-editor.fx.0.height=722
-editor.fx.0.width=800
-editor.fx.0.x=709
-editor.fx.0.y=113
+editor.fx.0.height=800
+editor.fx.0.width=638
+editor.fx.0.x=642
+editor.fx.0.y=0
 objectbench.height=101
-objectbench.width=461
-package.divider.horizontal=0.6
-package.divider.vertical=0.8007380073800738
-package.editor.height=427
-package.editor.width=674
-package.editor.x=1067
-package.editor.y=119
-package.frame.height=600
-package.frame.width=800
+objectbench.width=614
+package.divider.horizontal=0.6003236245954693
+package.divider.vertical=0.8586387434554974
+package.editor.height=649
+package.editor.width=512
+package.editor.x=0
+package.editor.y=0
+package.frame.height=800
+package.frame.width=638
 package.numDependencies=0
 package.numTargets=1
 package.showExtends=true

package.bluej

@@ -1,18 +1,18 @@
 #BlueJ package file
-editor.fx.0.height=722
-editor.fx.0.width=800
-editor.fx.0.x=709
-editor.fx.0.y=113
+editor.fx.0.height=800
+editor.fx.0.width=638
+editor.fx.0.x=642
+editor.fx.0.y=0
 objectbench.height=101
-objectbench.width=461
-package.divider.horizontal=0.6
-package.divider.vertical=0.8007380073800738
-package.editor.height=427
-package.editor.width=674
-package.editor.x=1067
-package.editor.y=119
-package.frame.height=600
-package.frame.width=800
+objectbench.width=614
+package.divider.horizontal=0.6003236245954693
+package.divider.vertical=0.8586387434554974
+package.editor.height=649
+package.editor.width=512
+package.editor.x=0
+package.editor.y=0
+package.frame.height=800
+package.frame.width=638
 package.numDependencies=0
 package.numTargets=1
 package.showExtends=true