> ls lecture2_*
lecture2_1.java   
> 
> javac lecture2-1.java
lecture2-1.java:2: '{' expected.
class lecture2-1 
              ^
1 error
>
> ls lecture2_*
lecture2_1.class  lecture2_1.java   
> 
> javac lecture2_1.java 
> 
> ls lecture2_*
lecture2_1.class  lecture2_1.java   
> 
> java lecture2_1
HelloWorld
> 
> ls lecture2_2*
lecture2_2.java  
>
> java lecture2_2.java 
Can't find class lecture2_2.java
>
> javac lecture2_2.java
lecture2_2.java:12: Missing term.
     MyIntVar = 5 - * 4;
                   ^
1 error
> ls lecture2_2*
lecture2_2.class  lecture2_2.java   
> 
> java lecture2_2
My int variable is: 2
My int variable is: 20
> 
> javac lecture2_3.java
>
> java lecture2_3
My int variable is: 2
My int variable is: 6
My int variable is: 18