Scalac compiler doesn't create a .class file - scala

Question

I am trying understand the error handling in scala.
I compiled the code as following
scalac sampleExceptionHandling.sc
I thought it would create a .class file and using javap command, I can look at the equivalent java code. For somereason, .class file isn't created. And no errors thrown either after executing Scalac command.
Any suggestion please?
import java.io.FileReader
import java.io.FileNotFoundException
import java.io.IOException
object Demo {
def main(args: Array[String]) {
try {
val f = new FileReader("input.txt")
} catch {
case ex: FileNotFoundException =>{
println("Missing file exception")
}
case ex: IOException => {
println("IO Exception")
}
}
}
}

Answer 1

It does create .class which is same as your class name not as your filename.
Following is the result of scalac sampleExceptionHandling.sc
$ ll
total 24
10909194 -rw-r--r-- 1 as18 prayagupd 936 Mar 15 10:00 Demo$.class
10909193 -rw-r--r-- 1 as18 prayagupd 565 Mar 15 10:00 Demo.class
10909167 -rw-r--r-- 1 as18 prayagupd 378 Mar 15 09:59 sampleExceptionHandling.sc
To run the class
$ scala Demo
Missing file exception
To see the bytecode,
$ javap -c Demo.class
Compiled from "sampleExceptionHandling.sc"
public final class Demo {
public static void main(java.lang.String[]);
Code:
0: getstatic #16 // Field Demo$.MODULE$:LDemo$;
3: aload_0
4: invokevirtual #18 // Method Demo$.main:([Ljava/lang/String;)V
7: return
}
And,
$ javap -c Demo$.class
Compiled from "sampleExceptionHandling.sc"
public final class Demo$ {
public static final Demo$ MODULE$;
public static {};
Code:
0: new #2 // class Demo$
3: invokespecial #12 // Method "<init>":()V
6: return
public void main(java.lang.String[]);
Code:
0: new #20 // class java/io/FileReader
3: dup
4: ldc #22 // String input.txt
6: invokespecial #25 // Method java/io/FileReader."<init>":(Ljava/lang/String;)V
9: astore 4
11: goto 35
14: astore_2
15: getstatic #30 // Field scala/Predef$.MODULE$:Lscala/Predef$;
18: ldc #32 // String IO Exception
20: invokevirtual #36 // Method scala/Predef$.println:(Ljava/lang/Object;)V
23: goto 35
26: astore_3
27: getstatic #30 // Field scala/Predef$.MODULE$:Lscala/Predef$;
30: ldc #38 // String Missing file exception
32: invokevirtual #36 // Method scala/Predef$.println:(Ljava/lang/Object;)V
35: return
Exception table:
from to target type
0 14 26 Class java/io/FileNotFoundException
0 14 14 Class java/io/IOException
}