{Push}

Labch2.rtf

@@ -2,7 +2,7 @@
 {\fonttbl\f0\fswiss\fcharset0 Helvetica;}
 {\colortbl;\red255\green255\blue255;}
 {\*\expandedcolortbl;;}
-\margl1440\margr1440\vieww10800\viewh8400\viewkind0
+\margl1440\margr1440\vieww12800\viewh8400\viewkind0
 \pard\tx720\tx1440\tx2160\tx2880\tx3600\tx4320\tx5040\tx5760\tx6480\tx7200\tx7920\tx8640\pardirnatural\partightenfactor0
 
 \f0\fs24 \cf0 2.1 ##################\
@@ -31,10 +31,103 @@
 # 500 cents.\
 ##################\
 \
-The same value is printed.\
 \
 \
+2.5 the printed value is different\
 \
-2.5\
 \
-2.6}
+2.6 \
+\
+\{\
+Methods\
+Const\
+Variables \
+\}\
+\
+2.7 Yes this will cause an error\
+\
+2.8 It is possible no syntactical error. \
+\
+2.9    private int price;\
+   \
+    private int balance;\
+    \
+    private int total;\
+\
+        const - \
+        price \
+        balance\
+        total \
+\
+	TicketMachine\
+	getPrice\
+	balance\
+	insertMoney\
+	printTicket\
+	\
+\
+2.10  price = ticketCost;\
+        balance = 0;\
+        total = 0;\
+	the prices seems to be set \
+\
+\pard\pardeftab720\partightenfactor0
+\cf0 Exercise 2.11 What do you think is the type of each of the following fields?\
+private int count;   	INT\
+private Student representative; 	STRING\
+private Server host;	STRING\
+\
+Exercise 2.12 What are the names of the following fields?\
+private boolean alive;\
+private Person tutor;\
+private Game game;\
+\
+Exercise 2.13 In the following field declaration from the TicketMachine class\
+private int price;\
+does it matter which order the three words appear in? Edit the TicketMachine class to\
+try different orderings. After each change, close the editor. Does the appearance of the\
+class diagram after each change give you a clue as to whether or not other orderings are\
+possible? Check by pressing the Compile button to see if there is an error message.\
+Make sure that you reinstate the original version after your experiments!\
+\
+Exercise 2.14 Is it always necessary to have a semicolon at the end of a field declaration?\
+Once again, experiment via the editor. The rule you will learn here is an\
+important one, so be sure to remember it. \
+\
+	YES, the java lang read needs a semicolon to read statements\
+\
+Exercise 2.15 Write in full the declaration for a field of type int whose name is\
+status.\
+ \
+\
+\
+Exercise 2.16 To what class does the following constructor belong?\
+public Student(String name)\
+\
+Exercise 2.17 How many parameters does the following constructor have and\
+what are their types?\
+public Book(String title, double price)\
+\
+2 params, String & double\
+\
+Exercise 2.18 Can you guess what types some of the Book class\'92s fields might\
+be? Can you assume anything about the names of its fields?\
+\
+Exercise 2.19 Suppose that the class Pet has a field called name that is of type\
+String. Write an assignment statement in the body of the following constructor so\
+that the name field will be initialized with the value of the constructor\'92s parameter.\
+public Pet(String petsName)\
+\{\
+...\
+\}\
+Exercise 2.20 Challenge exercise What is wrong with the following version of the\
+constructor of TicketMachine?\
+public TicketMachine(int ticketCost)\
+\{\
+int price = ticketCost;\
+balance = 0;\
+total = 0;\
+\}\
+TICKETCOST IS ALREADY ASSIGN AS AN INT.\
+\
+}

TicketMachine.java

@@ -35,12 +35,12 @@ public class TicketMachine
      */
     
    
-    public TicketMachine(int newPrice);
+    //public TicketMachine(int newPrice);
     
     
     public TicketMachine()
     {
-        price = newPrice;
+        //price = newPrice;
         balance = 0;
         total = 0;
         budget = 1000;
@@ -91,9 +91,7 @@ the value in budget. If price is greater than budget then print the message ‘T
 expensive’, otherwise print the message ‘Just right’.
  */
 
-    //if(price == budget){
-        
-    }
+    //if(price == budget){}
     /**
      * Print a ticket.
      * Update the total collected and

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
-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
+editor.fx.0.height=709
+editor.fx.0.width=960
+editor.fx.0.x=314
+editor.fx.0.y=23
+objectbench.height=164
+objectbench.width=556
+package.divider.horizontal=0.5995740149094781
+package.divider.vertical=0.7373271889400922
+package.editor.height=473
+package.editor.width=833
+package.editor.x=0
+package.editor.y=23
+package.frame.height=709
+package.frame.width=959
 package.numDependencies=0
 package.numTargets=1
 package.showExtends=true