Java
Unreachable Statement
Common exception handled by compiler
An unreachable statement + causes a compilation error.
The java compiler
needs to know that
it can reach every
line of code.
1. public float parseFloat( String s ){
2. float f = 0.0f; // 1
3. try{
4. f = Float.valueOf( s ).floatValue(); // 2
5. return f ; // 3
6. }
7. catch(NumberFormatException nfe){
8. f = Float.NaN ; // 4
9. return f; // 5
10. }
11. finally {
12. return f; // 6
13. }
14. return f ; // 7
15. }Since the Finally try-catch overriding power ,
if a return statement is added to
the finally block,
the rest of code is unreachable.