Complete newcomer question (cannot find symbol)

Question

on terminal, I was given 20 error messages...
DemoVariables.java:11: cannot find symbol
symbol : variable sum
location: class DemoVariables
sum = value1 + value2;
^
DemoVariables.java:11: cannot find symbol
symbol : variable value1
location: class DemoVariables
sum = value1 + value2;
^
DemoVariables.java:11: cannot find symbol
symbol : variable value2
location: class DemoVariables
sum = value1 + value2;
^
DemoVariables.java:12: cannot find symbol
symbol : variable difference
location: class DemoVariables
difference = value1 - value2;
^
DemoVariables.java:12: cannot find symbol
symbol : variable value1
location: class DemoVariables
difference = value1 - value2;
^
DemoVariables.java:12: cannot find symbol
symbol : variable value2
location: class DemoVariables
difference = value1 - value2;
^
DemoVariables.java:13: cannot find symbol
symbol : variable product
location: class DemoVariables
product = value1 * value2;
^
DemoVariables.java:13: cannot find symbol
symbol : variable value1
location: class DemoVariables
product = value1 * value2;
^
DemoVariables.java:13: cannot find symbol
symbol : variable value2
location: class DemoVariables
product = value1 * value2;
^
DemoVariables.java:14: cannot find symbol
symbol : variable quotient
location: class DemoVariables
quotient = value1 / value2;
^
DemoVariables.java:14: cannot find symbol
symbol : variable value1
location: class DemoVariables
quotient = value1 / value2;
^
DemoVariables.java:14: cannot find symbol
symbol : variable value2
location: class DemoVariables
quotient = value1 / value2;
^
DemoVariables.java:15: cannot find symbol
symbol : variable modulus
location: class DemoVariables
modulus = value1 % value2;
^
DemoVariables.java:15: cannot find symbol
symbol : variable value1
location: class DemoVariables
modulus = value1 % value2;
^
DemoVariables.java:15: cannot find symbol
symbol : variable value2
location: class DemoVariables
modulus = value1 % value2;
^
DemoVariables.java:16: cannot find symbol
symbol : variable sum
location: class DemoVariables
System.out.println("Sum is " + sum);
^
DemoVariables.java:17: cannot find symbol
symbol : variable difference
location: class DemoVariables
System.out.println("Difference is " + difference);
^
DemoVariables.java:18: cannot find symbol
symbol : variable product
location: class DemoVariables
System.out.println("Product is " + product);
^
DemoVariables.java:19: cannot find symbol
symbol : variable quotient
location: class DemoVariables
System.out.println("Quotient is " + quotient);
^
DemoVariables.java:20: cannot find symbol
symbol : variable modulus
location: class DemoVariables
System.out.println("Modulus is " + modulus);
^
THE SOURCE:
public class DemoVariables
public static void main(String[] args)
int oneInt = 315;
short oneShort = 23;
long oneLong = 123456789876543L;
System.out.println("The int is " + oneInt);
System.out.println("The short is " + oneInt);
System.out.println("The long is " + oneLong);
sum = value1 + value2;
difference = value1 - value2;
product = value1 * value2;
quotient = value1 / value2;
modulus = value1 % value2;
System.out.println("Sum is " + sum);
System.out.println("Difference is " + difference);
System.out.println("Product is " + product);
System.out.println("Quotient is " + quotient);
System.out.println("Modulus is " + modulus);
int value1 = 43, value2 = 10, sum, difference, product, quotient, modulus;
Can anyone tell me what I did wrong?
Thanks...

Answer 1

Similar problem
This is the objective of my lesson: Develop a class to represents a human. The head, arms and legs should be properties of the human and should be represented by separate objects. All of your objects should have at least three properties and one method.
public class Human
     Head human_head;
     public Human(String color1, String size1, String color2)
          human_head = new Head(color1, size1, color2);
     public static void main(String[] args)
          Human mke = new Human("green", "big", "blonde");
          System.out.println("My name is Phil I have " + mke.human_head + "eyes head hair");
C:\java_code>javac usingobjects\Human.java
usingobjects\Human.java:8: cannot find symbol
symbol : class Head
location: class usingobjects.Human
Head human_head;
^
usingobjects\Human.java:14: cannot find symbol
symbol : class Head
location: class usingobjects.Human
human_head = new Head(color1, size1, color2);
^
2 errors
C:\java_code>