Question & Answer: Objectives The objective is to help students understand how to create Applets Steps In this lab, you are going to provide code that builds the Applet sho…..

Code to copy

//SodaMachineApplet.java
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.util.*;
import java.text.*;

//Class
public class SodaMachineApplet extends Applet implements ActionListener
{
//Needed text field variables
private TextField priceText;
private TextField coinText;
private TextField returnText;
private TextField canDropText;
private TextField totalDepositText;

//Needed button variables
private Button[] buttonsForSoda;
private Button buttonsForCoinReturn;

//Array for soda
private String[] sodaArray = {“COKE”,”GINGER-Ale”,”ROOT BEER”,”empty”,”empty”};

//Needed variables
private int sselection=1;
private boolean isValid=false;
static int coinTotal=0;
static int coin=0;
static int price=60;
static String stringForCoin;

//Method init()
public void init()
{
//Set layout
setLayout(new BorderLayout());

//Create a panel
Panel ourPanel1 = new Panel();

//Set layout for panel
ourPanel1.setLayout(new FlowLayout());

//Initialize
totalDepositText = new TextField(15);
totalDepositText.setEditable(false);
totalDepositText.setText(“Price .”+price);

//Add to panel
ourPanel1.add(new Label(“TOTAL:”));
ourPanel1.add(totalDepositText);

//Initialize
coinText = new TextField(5);
coinText.setEditable(true);
coinText.addActionListener(this);

//Add to panel
ourPanel1.add(new Label(“COIN SLOT:”));
ourPanel1.add(coinText);
add(“North”, ourPanel1);

//Create panel
Panel ourPanel2 = new Panel();

//Set layout for panel
ourPanel2.setLayout(new GridLayout(3,2));

//Create
buttonsForSoda = new Button[sodaArray.length];

//Loop
for (int i=0; i < sodaArray.length; i++)
{
//Initialize
buttonsForSoda[i] = new Button(sodaArray[i]);
buttonsForSoda[i].addActionListener(this);
ourPanel2.add(buttonsForSoda[i]);
}

//Initialize
buttonsForCoinReturn = new Button(“COIN RETURN”);
buttonsForCoinReturn.addActionListener(this);

//Add
ourPanel2.add(buttonsForCoinReturn);
add (“Center”, ourPanel2);

//Create panel
Panel ourPanel3 = new Panel();

//Set layout for panel
ourPanel3.setLayout(new FlowLayout());

//Create
canDropText = new TextField(15);
canDropText.setEditable(false);

//Add
ourPanel3.add(new Label(“CAN SLOT:”));
ourPanel3.add(canDropText);

//Initialize
returnText = new TextField(5);
returnText.setEditable(false);

//Add
ourPanel3.add(new Label(“Coin Return:”));
ourPanel3.add(returnText);
add (“South”,ourPanel3);
}

//Method actionPerformed()
public void actionPerformed(ActionEvent e)
{
//Create
Object src = e.getSource();

//Check condition
if (src == coinText)
{
//Display
System.out.println(“at coinText”);

//Function call
resetSale();

//Function call
validateIt();

//Check condition
if (isValid)

//Function call
calculateCoin();
}

//Check condition
else if (src == buttonsForCoinReturn)

//Function call
moneyReturn();

//Otherwise
else

//Function call
sodeSelection(e.getActionCommand());
}

//Method resetSale()
public void resetSale()
{
//Display
System.out.println(“Reset”);

//Reset
canDropText.setText(“”);

//Reset
returnText.setText(“”);
}

//Method postSale()
public void postSale()
{
//Display
System.out.println(“post Sale”);

//Reset
coinText.setText(“”);

//Display
totalDepositText.setText(“Price: .”+price);

//Update
coinTotal = 0;
coin = 0;
isValid=false;
}

//Method validateIt()
public void validateIt()
{
//Initialize
stringForCoin = coinText.getText();

//Display
System.out.println(“Validate”);

//Check condition
if(! stringForCoin.equals(“”))
{
//Update
coin = new Integer(stringForCoin.trim()).intValue();

//Check condition
if(coin==5 | coin==10 | coin==25 | coin==100)

//Update
isValid=true;

//Otherwise
else
{
//Update
isValid=false;
canDropText.setText(“Invalid Coin”);
returnText.setText(“”+coin);
coinText.setText(“”);
}
}
}

//Method calculateCoin()
public void calculateCoin()
{
//Initialize
coinTotal = coinTotal + coin;

//Check condition
if (coinTotal==100)

//Update
totalDepositText.setText(“1.00”);

//Check condition
else if (coinTotal==5)

//Update
totalDepositText.setText(“.05”);

//Otherwise
else

//Update
totalDepositText.setText(“.”+(coinTotal));
coinText.setText(“”);

//Display
System.out.println(“Post Calculation”);

//Check condition
if(coinTotal >= price)
{
//Update
isValid = true;
totalDepositText.setText(“MAKE SELECTION”);
}
}

//Method moneyReturn()
public void moneyReturn()
{
//Display
System.out.println(“Coin return1”);

//Check condition
if (coinTotal==100)

//Update
returnText.setText(“1.00”);

//Check condition
else if (coinTotal==5)

//Update
returnText.setText(“.05”);

//Otherwise
else

//Update
returnText.setText(“.”+(coinTotal));

//Display
System.out.println(“Coin return2”);

//Function call
postSale();
}

//Method sodeSelection()
public void sodeSelection(String pop)
{
//Initialize
sselection = 0;

//Loop
while(!pop.equals(sodaArray[sselection]))

//Increment
sselection++;

//Check condition
if (! sodaArray[sselection].equals(“empty”))
{
//Check condition
if (coinTotal>=price)
{
//Set
canDropText.setText(sodaArray[sselection]);

//Check condition
if (coinTotal >price)
{
//Check condition
if ((coinTotal-price)==5)

//Return
returnText.setText(“.05”);

//Otherwise
else

//Return
returnText.setText(“.”+(coinTotal-price));
}

//Function call
postSale();
}
}
}
}

<!– SodaMachineApplet.html –>
<!– Html tag –>
<html>

<!– Applet code –>
<applet code=”SodaMachineApplet.class” height=300 width=500></applet>

<!– End of html tag –>
</html>