double cannot be dereferenced

Hi I am new to Java. I keep getting this error that says double cannot be dereferenced, below is my code. Please don't yell at me to much as I have only been writing Java for about 3 weeks! Thanks for any help you can provide.

import java.text.DecimalFormat;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

/**
*
* @author Andy
*/
public class javagui extends javax.swing.JPanel {

//2d array
double[][] timeWage;
//position in array
int timeWageIndex = 0;
//minimum wage
double minimumWage = 6.55;
static final String lineSeparator = System.getProperty("line.separator");
private JLabel tutMinsLabel;
private JLabel earningsLabel;
private JScrollPane jScrollPane1;
private JTextArea reportTextArea;
private JTextField tutorTimeText;
private JTextField paymentText;
private JButton enterButton;
private JButton reportButton;
private JButton quitButton;
private double tutorTime;
private double payment;
private JLabel tutorTimeLabel;




/** Creates new form GUI */
public javagui() {
initComponents();

}

/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {


tutorTimeLabel = new javax.swing.JLabel();
earningsLabel = new javax.swing.JLabel();
jScrollPane1 = new javax.swing.JScrollPane();
reportTextArea = new javax.swing.JTextArea();
tutorTimeText = new javax.swing.JTextField();
paymentText = new javax.swing.JTextField();
enterButton = new javax.swing.JButton();
reportButton = new javax.swing.JButton();
quitButton = new javax.swing.JButton();

tutorTimeLabel.setText("Enter total tutoring time in minutes:");

earningsLabel.setText("Enter total amount earned this session:");

reportTextArea.setColumns(20);
reportTextArea.setRows(5);
jScrollPane1.setViewportView(reportTextArea);

enterButton.setText("Enter");
enterButton.addActionListener(new java.awt.event.ActionListener() {
@Override
public void actionPerformed(java.awt.event.ActionEvent evt) {
enterButtonActionPerformed(evt);
}
});

reportButton.setText("Report");
reportButton.addActionListener(new java.awt.event.ActionListener() {
@Override
public void actionPerformed(java.awt.event.ActionEvent evt) {
reportButtonActionPerformed(evt);
}
});

quitButton.setText("Quit");
quitButton.addActionListener(new java.awt.event.ActionListener() {
@Override
public void actionPerformed(java.awt.event.ActionEvent evt) {
quitButtonActionPerformed(evt);
}
});

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(23, 23, 23)
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 434, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.Component Placement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.LEADING, false)
.addComponent(enterButton, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(reportButton, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(quitButton, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.TRAILING, false)
.addComponent(tutMinsLabel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(earningsLabel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.LEADING, false)
.addComponent(paymentText)
.addComponent(tutorTimeText, javax.swing.GroupLayout.DEFAULT_SIZE, 120, Short.MAX_VALUE))))
.addContainerGap(58, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(tutorTimeText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(24, 24, 24)
.addComponent(tutMinsLabel)))
.addPreferredGap(javax.swing.LayoutStyle.Component Placement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.BASELINE)
.addComponent(earningsLabel)
.addComponent(paymentText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.G roupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(enterButton)
.addPreferredGap(javax.swing.LayoutStyle.Component Placement.UNRELATED)
.addComponent(reportButton)
.addGap(18, 18, 18)
.addComponent(quitButton)
.addContainerGap(320, Short.MAX_VALUE))
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 426, Short.MAX_VALUE)))
);
}// </editor-fold>

private void enterButtonActionPerformed(java.awt.event.ActionEv ent evt) {
// TODO add your handling code here:


//Code Exception error messages when data keyed incorrectly for both textfields
double time = 0;
double wage = 0;

//Validates time
try {
time = Double.parseDouble(tutorTime.getText());
} catch (NumberFormatException e1) {
JOptionPane.showMessageDialog(null, "The time must be a decimal number", "Invalid Input",JOptionPane.ERROR_MESSAGE);
}

//Validate wage
try {
wage = Double.parseDouble(payment.getText());
} catch (NumberFormatException e1) {
JOptionPane.showMessageDialog(null, "The wage must be a decimal number", "Invalid Input",JOptionPane.ERROR_MESSAGE);
}

//Time greater than 0 and less than 4 hours
if(time<=0 || time>240){
JOptionPane.showMessageDialog(null, "The time must greater than 0 and less than or equal to 4 hours (240 min)",
"Invalid Input",JOptionPane.ERROR_MESSAGE);
}
else{
//Wage greater than 0
if(wage<=0){
JOptionPane.showMessageDialog(null, "The wage must greater than 0",
"Invalid Input",JOptionPane.ERROR_MESSAGE);
}
else{
//update array values
timeWage[timeWageIndex][0] = time;
timeWage[timeWageIndex][1] = wage;

//increment index
timeWageIndex++;

//Reset text for user entry
tutorTime.setText("");
payment.setText("");
}


private void quitButtonActionPerformed(java.awt.event.ActionEve nt evt) {
//select to close the Calculator
System.exit(0);

}

private void reportButtonActionPerformed(java.awt.event.ActionE vent evt) {
// TODO add your handling code here:

reportTextArea.setText(""); // clear previous report
String newline = "\n";
double timeTotal = 0;
double wageTotal = 0;


//Loops through each entry
for(int i = 0; i<=timeWageIndex-1; i++){
//Gets current entry time
double time = timeWage[i][0];
//Gets current entry wage
double wage = timeWage[i][1];
//Adds to sums
timeTotal += time;
wageTotal += wage;

reportTextArea.append("Minutes = " + time + " Earnings = $" + wage + newline);
}

DecimalFormat df = new DecimalFormat("#.##");
double average = wageTotal / (timeTotal/60);
//Displays report
reportTextArea.append(newline + newline + "*****************************" + newline + newline + newline);
reportTextArea.append("Report of your wages to Date:" + newline + newline);
reportTextArea.append("Total Minutes Spent Tutoring = " + timeTotal + newline);
reportTextArea.append("Total Earnings = $" + wageTotal + newline);
reportTextArea.append("Average Per Hour Wage = $" + df.format(average) + newline + newline);
reportTextArea.append("Minimum Wage is currently: $" + minimumWage + newline);

if(average<minimumWage) {
reportTextArea.append("Your average wages are less than average");
}
else if(average>minimumWage && average < minimumWage*2.0) {
reportTextArea.append("Your average wages are average");
}
else if(average >= minimumWage*2.0) {
reportTextArea.append("Your average wages are above average");
}
}
}

When dealing with objects you access them through a reference. When you call a method it is called dereferencing. Since double is a primitive and primitives do not have methods this is why you are getting this error.

You don't need to post pages of code when only a few lines will do. In particular you should post the lines causing the error.

Also please use [code] tags [/code] when posting code.