problem with variables

Hey! I'm new to all this so be kind :o! I am having trouble with variables, I get the following errors and don't know how to fix it! Any help would be greatly appreciated! Thanks!
----jGRASP exec: javac -g H:\insurance_sales.java

insurance_sales.java:28: non-static variable carValue cannot be referenced from a static context
carValue = 22000;
^
insurance_sales.java:31: non-static variable carValue cannot be referenced from a static context
carValue = 23000;
^
insurance_sales.java:34: non-static variable carValue cannot be referenced from a static context
carValue = 30000;
^
insurance_sales.java:37: non-static variable carValue cannot be referenced from a static context
carValue = 100000;
^
insurance_sales.java:40: non-static variable carValue cannot be referenced from a static context
carValue = 15000;
^
insurance_sales.java:43: non-static variable carValue cannot be referenced from a static context
carValue = 26000;
^
insurance_sales.java:51: non-static variable fuelType cannot be referenced from a static context
if ( fuelType = "Petrol" ) //IF statements assigns value to petrol/diesel
^
insurance_sales.java:51: incompatible types
found : java.lang.String
required: int
if ( fuelType = "Petrol" ) //IF statements assigns value to petrol/diesel
^
insurance_sales.java:51: incompatible types
found : int
required: boolean
if ( fuelType = "Petrol" ) //IF statements assigns value to petrol/diesel
^
insurance_sales.java:52: non-static variable fuelType cannot be referenced from a static context
fuelType = 350;
^
insurance_sales.java:55: non-static variable fuelType cannot be referenced from a static context
if ( fuelType = "Diesel")
^
insurance_sales.java:55: incompatible types
found : java.lang.String
required: int
if ( fuelType = "Diesel")
^
insurance_sales.java:55: incompatible types
found : int
required: boolean
if ( fuelType = "Diesel")
^
insurance_sales.java:56: non-static variable fuelType cannot be referenced from a static context
fuelType = 200;
^
insurance_sales.java:62: cannot find symbol
symbol : variable transmisson
location: class insurance_sales
switch (transmisson) {
^
insurance_sales.java:64: cannot find symbol
symbol : variable transmissonPrice
location: class insurance_sales
transmissonPrice = 200;
^
insurance_sales.java:67: cannot find symbol
symbol : variable transmissonPrice
location: class insurance_sales
transmissonPrice = 400;
^
insurance_sales.java:79: non-static variable enginePrice cannot be referenced from a static context
enginePrice = 300;
^
insurance_sales.java:82: non-static variable enginePrice cannot be referenced from a static context
enginePrice = 500;
^
insurance_sales.java:85: non-static variable enginePrice cannot be referenced from a static context
enginePrice = 600;
^
insurance_sales.java:88: non-static variable enginePrice cannot be referenced from a static context
enginePrice = 800;
^
insurance_sales.java:91: non-static variable enginePrice cannot be referenced from a static context
enginePrice = 1000;
^
insurance_sales.java:96: non-static variable totalPrice cannot be referenced from a static context
System.out.println("Premium payable " + totalPrice);
^
23 errors

----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.


My code looks like this

public class insurance
{

String Name;
String Address;
String carName;
String fuelType;
String carValue;
int Age;
String transmission;
int engineSize;




public insurance (String Name, String Address, String carName, int Age,String Transmission, int engineSize)
{
this.Name = Name;
this.Address = Address;
this.carName = carName;
this.Age = Age;
this.transmission = transmission;
this.engineSize = engineSize;
}

String Name()
{
return Name;
}

String Address()
{
return Address;

}

String carName()
{
return carName;
}

String transmisson()
{
return transmission;
}

String carValue()
{
return carValue;
}
String fuelType()
{
return fuelType;
}


int engineSize()
{
return engineSize;
}
}

__________________________________________


import java.util.Scanner;

class insurance_sales //name of class
{
String Name = "";
String Address = "";
int carName = 0;
int fuelType = 0;
int transmissionPrice =0;
int engineSize = 0;
int carValue = 0;
int enginePrice = 0;
int totalPrice = carValue + fuelType + transmissionPrice + enginePrice;



public static void main(String args[])
{
System.out.println("!Welcome to Cheap Insurances.Com!");
System.out.println(" Please fill in the information, if you are eligible for cover, a quote will be given");
Scanner scan = new Scanner(System.in);

System.out.println("Please enter the make of car:");
int carName = scan.nextInt();

switch (carName) { //switch statement for the name of the car and to assign the values to each car
case 1: System.out.println("Ford");
carValue = 22000;
break;
case 2: System.out.println("Fiat");
carValue = 23000;
break;
case 3: System.out.println("BMW");
carValue = 30000;
break;
case 4: System.out.println("Ferrari");
carValue = 100000;
break;
case 5: System.out.println("Opel");
carValue = 15000;
break;
case 6: System.out.println("Alfa");
carValue = 26000;
break;
default: System.out.println("Invalid Car.");break;
}


System.out.println("Please choose fuel type (Petrol/Diesel?):");
String fuel = scan.nextLine();
if ( fuelType = "Petrol" ) //IF statements assigns value to petrol/diesel
fuelType = 350;

else
if ( fuelType = "Diesel")
fuelType = 200;



System.out.println("Please choose transmission type: Manual/Automatic");
int transmission = scan.nextInt(); //switch statement to choose transmission type
switch (transmisson) {
case 1: System.out.println("Manual");
transmissonPrice = 200;
break;
case 2: System.out.println("Automatic");
transmissonPrice = 400;
break;
default: System.out.println("Invalid type");
break;
}


System.out.println("Please enter engine size (In cc only eg. 1200cc, 2000cc");
//IF statement to determine the engine size and price
int engineSize = scan.nextInt();

if ( engineSize >= 1200 )
enginePrice = 300;
else
if ( engineSize >= 1400)
enginePrice = 500;
else
if ( engineSize >= 1600)
enginePrice = 600;
else
if ( engineSize >= 1800)
enginePrice = 800;
else
if ( engineSize < 2000)
enginePrice = 1000;




System.out.println("Premium payable " + totalPrice);
}
}

Code:

---


class insurance_sales //name of class
{
String Name = "";
String Address = "";
[B]int carName = 0;[/B]
int fuelType = 0;
int transmissionPrice =0;
int engineSize = 0;
int carValue = 0;
int enginePrice = 0;
int totalPrice = carValue + fuelType + transmissionPrice + enginePrice;



public static void main(String args[])
{
System.out.println("!Welcome to Cheap Insurances.Com!");
System.out.println(" Please fill in the information, if you are eligible for cover, a quote will be given");
Scanner scan = new Scanner(System.in);

System.out.println("Please enter the make of car:");
[B]int carName [/B]= scan.nextInt();

---

Man you declared two times on one variable.Be attentive.

You have to correct the comparation operator in your "if" statements.

Code:

---

if ( fuelType [B][COLOR="Red"]=[/COLOR][/B] "Petrol" )
.
.
.
if ( fuelType [COLOR="red"][B]=[/B][/COLOR] "Diesel")

---

Use "=="

Luck,
CJSL

You're referencing instance variables from within your main method, which is a static method (method belonging to the class, not to an instance). You need to instantiate your class first before referencing those variables.

Found another glitch...
fuelType is define as an int, but is being compared against a string

Code:

---

[B][COLOR="Red"]int[/COLOR][/B] fuelType = 0;
.
.
.
if ( fuelType == [B][COLOR="red"]"Petrol"[/COLOR][/B] ) //this is the correct comparation I mentioned in my previous post

---

Luck,
CJSL