Close any open files and now open ClassB.java. Look at the two variables defined at the

top and notice y has the word static in its definition. This means y is static but x is not.

$2.$ In the main method, add two lines to initialize both x and y to have values of $10,$ i$.$e$.$

x $=10$;

y $=10$;

$3.$ You should see that the first of those two lines shows a compiler error. This is because x

is non$-$static and we are trying to access it in a static method. Basically the problem is$,$

there is no indication of which x should be given a value of $10.$ Non$-$static variables have

to be accessed on objects rather than in a static way like this.

$4.$ Before the line x $=10$;$,$ create an object of ClassB using the following line:

ClassB obj $=$ new ClassB$()$;

$5.$ Now change the offending line so refer to the x variable on the obj object:

obj.x $=10$;

$6.$ Now it should work. This is because we are telling it which x to change to $10.$ It is the x in

the obj object.