General Errors

I'm pretty new with java, and I'm not sure how to deal with these error messages. Here is the code:

import java.io.*;

public class Poly{

public static void main(String[] args){

//first have the user enter the inputs

{

int x;

int y;

int z;

System.out.println("Enter first root");

x = IO.readInt();

System.out.println("Enter second root");

y = IO.readInt();

System.out.println("Enter third root");

z = IO.readInt();

}

/*next is the algorithim to determine the polynomial. This is done by determining the values of a,b,c and d

in the formmula ax^3 + bx^2 + cx+ d */

{

int value_one = x + y;

int value_two = x * y;

int value_three = z * value_one;

int value_four = z * value_two;

int value_five = z + value_one;

int value_six = value_two + value_three;

}

//finally we print the polynomial

{

System.out.println("The polynomial is x^3 + 'value_five'x^2 + 'value_six'x + 'value_four'");

}

}

Here are the errors the compiler is giving me.



ruw-172:code Flowing13$ javac -classpath . Poly.java

Poly.java:13: cannot find symbol

symbol : variable I0

location: class Poly

x = I0.readInt();

^

Poly.java:16: cannot find symbol

symbol : variable I0

location: class Poly

y = I0.readInt();

^

Poly.java:19: cannot find symbol

symbol : variable I0

location: class Poly

z = I0.readInt();

^

Poly.java:24: cannot find symbol

symbol : variable x

location: class Poly

int value_one = x + y;

^

Poly.java:24: cannot find symbol

symbol : variable y

location: class Poly

int value_one = x + y;

^

Poly.java:24: incompatible types

found : java.lang.String

required: int

int value_one = x + y;

^

Poly.java:25: cannot find symbol

symbol : variable x

location: class Poly

int value_two = x * y;

^

Poly.java:25: cannot find symbol

symbol : variable y

location: class Poly

int value_two = x * y;

^

Poly.java:26: cannot find symbol

symbol : variable z

location: class Poly

int value_three = z * value_one;

^

Poly.java:27: cannot find symbol

symbol : variable z

location: class Poly

int value_four = z * value_two;

^

Poly.java:28: cannot find symbol

symbol : variable z

location: class Poly

int value_five = z + value_one;

^

Poly.java:28: incompatible types

found : <nulltype>

required: int

int value_five = z + value_one;

^

Can anyone help with these? I'm not sure how to go about fixing them.