hi trying to get this code to compile but it comes up with errors:


class ExampleOneBeta
{
public static void main(String args[])
{
ExampleOne ExampleOne_object = new ExampleOne();
//The line above is invoking an object of the type ExampleOne
int variable_1 = 10;
double variable_2 =5.5;
char variable_3 ='A';
local_variable_1 = ExampleOne_object.variable_1;
local_variable_2 = ExampleOne_object.variable_2;
local_variable_3 = ExampleOne_object.variable_3;
System.out.print(local_variable_1);
// System.out.print(" ");
// System.out.print(local_variable_2);
// System.out.print(" ");
// System.out.print(local_variable_3);
}
}

the errors are:


example_one.java:5: cannot find symbol
symbol : class ExampleOne
location: class ExampleOneBeta
ExampleOne ExampleOne_object = new ExampleOne();
^
example_one.java:5: cannot find symbol
symbol : class ExampleOne
location: class ExampleOneBeta
ExampleOne ExampleOne_object = new ExampleOne();
^
example_one.java:10: cannot find symbol
symbol : variable local_variable_1
location: class ExampleOneBeta
local_variable_1 = ExampleOne_object.variable_1;
^
example_one.java:11: cannot find symbol
symbol : variable local_variable_2
location: class ExampleOneBeta
local_variable_2 = ExampleOne_object.variable_2;
^
example_one.java:12: cannot find symbol
symbol : variable local_variable_3
location: class ExampleOneBeta
local_variable_3 = ExampleOne_object.variable_3;
^
example_one.java:13: cannot find symbol
symbol : variable local_variable_1
location: class ExampleOneBeta
System.out.print(local_variable_1);
^
6 errors

any ideas ???
i am new to java

: hi trying to get this code to compile but it comes up with errors:
:
:
: class ExampleOneBeta
: {
: public static void main(String args[])
: {
: ExampleOne ExampleOne_object = new ExampleOne();
: //The line above is invoking an object of the type ExampleOne
: int variable_1 = 10;
: double variable_2 =5.5;
: char variable_3 ='A';
: local_variable_1 = ExampleOne_object.variable_1;
: local_variable_2 = ExampleOne_object.variable_2;
: local_variable_3 = ExampleOne_object.variable_3;
: System.out.print(local_variable_1);
: // System.out.print(" ");
: // System.out.print(local_variable_2);
: // System.out.print(" ");
: // System.out.print(local_variable_3);
: }
: }
:
: the errors are:
:
:
: example_one.java:5: cannot find symbol
: symbol : class ExampleOne
: location: class ExampleOneBeta
: ExampleOne ExampleOne_object = new ExampleOne();
: ^
: example_one.java:5: cannot find symbol
: symbol : class ExampleOne
: location: class ExampleOneBeta
: ExampleOne ExampleOne_object = new ExampleOne();
: ^
: example_one.java:10: cannot find symbol
: symbol : variable local_variable_1
: location: class ExampleOneBeta
: local_variable_1 = ExampleOne_object.variable_1;
: ^
: example_one.java:11: cannot find symbol
: symbol : variable local_variable_2
: location: class ExampleOneBeta
: local_variable_2 = ExampleOne_object.variable_2;
: ^
: example_one.java:12: cannot find symbol
: symbol : variable local_variable_3
: location: class ExampleOneBeta
: local_variable_3 = ExampleOne_object.variable_3;
: ^
: example_one.java:13: cannot find symbol
: symbol : variable local_variable_1
: location: class ExampleOneBeta
: System.out.print(local_variable_1);
: ^
: 6 errors
:
: any ideas ???
: i am new to java
:
:
Your class definition is called ExampleOneBeta, while in your code you use the name ExampleOne. You define various variables using the name variable_#, where # is a number. In your code you use local_variable_# instead of the defined names. This mixing of names confuses the compiler, since it doesn't know what the variable called local_variable_1 stands for, what type it is, how much memory it needs to reserve for it, etc.

thanks, changed the code to:

{
public static void main(String args[])
{
ExampleOneBeta ExampleOneBeta_object = new ExampleOneBeta();

//The line above is invoking an object of the type ExampleOneBeta

int local_variable_1 = 10;
double local_variable_2 =5.5;
char local_variable_3 ='A';

local_variable_1 = ExampleOneBeta_object.local_variable_1;
local_variable_2 = ExampleOneBeta_object.local_variable_2;
local_variable_3 = ExampleOneBeta_object.local_variable_3;

System.out.print(local_variable_1);
System.out.print(" ");
System.out.print(local_variable_2);
System.out.print(" ");
System.out.print(local_variable_3);



now get the following errors:



example_one.java:13: cannot find symbol
symbol : variable local_variable_1
location: class ExampleOneBeta
local_variable_1 = ExampleOneBeta_object.local_variable_1;
^
example_one.java:14: cannot find symbol
symbol : variable local_variable_2
location: class ExampleOneBeta
local_variable_2 = ExampleOneBeta_object.local_variable_2;
^
example_one.java:15: cannot find symbol
symbol : variable local_variable_3
location: class ExampleOneBeta
local_variable_3 = ExampleOneBeta_object.local_variable_3;
^
3 errors

thanks

: thanks, changed the code to:
:
: {
: public static void main(String args[])
: {
: ExampleOneBeta ExampleOneBeta_object = new ExampleOneBeta();
:
: //The line above is invoking an object of the type ExampleOneBeta
:
: int local_variable_1 = 10;
: double local_variable_2 =5.5;
: char local_variable_3 ='A';
:
: local_variable_1 = ExampleOneBeta_object.local_variable_1;
: local_variable_2 = ExampleOneBeta_object.local_variable_2;
: local_variable_3 = ExampleOneBeta_object.local_variable_3;
:
: System.out.print(local_variable_1);
: System.out.print(" ");
: System.out.print(local_variable_2);
: System.out.print(" ");
: System.out.print(local_variable_3);
:
:
:
: now get the following errors:
:
:
:
: example_one.java:13: cannot find symbol
: symbol : variable local_variable_1
: location: class ExampleOneBeta
: local_variable_1 = ExampleOneBeta_object.local_variable_1;
: ^
: example_one.java:14: cannot find symbol
: symbol : variable local_variable_2
: location: class ExampleOneBeta
: local_variable_2 = ExampleOneBeta_object.local_variable_2;
: ^
: example_one.java:15: cannot find symbol
: symbol : variable local_variable_3
: location: class ExampleOneBeta
: local_variable_3 = ExampleOneBeta_object.local_variable_3;
: ^
: 3 errors
:
: thanks
:
In java there are 2 kinds of variables: local and object variables. You have defined 3 local variables, but no object variables. Then in your code you try to assign values from undefined object variables to local variables. In other words: local_variable_1 is not the same as ExampleOneBeta_object.local_variable_1.