Short java if else if else statement

Question

I have a if else short statement as follows:

(one == two) ? "do this" : "do this"

Is there anyway to add an if else into this statement?

I can't seem to find anything with an if else...

I'm being specific to the short statement, as opposed to do if if else else longhand.

Thanks.

Answer 1

You can extend this to any number of clauses, in perfect analogy to the if-else construct.

return a == b? "b"
     : a == c? "c"
     : a == d? "d"
     : "x";

In this form it quite closely resembles Lisp's cond , both in shape and in semantics.

But, do note that this is not a "shorthand for if/else" because it is an expression whereas if/else is a statement . It would be quite bad abuse of the ternary operator if the expressions had any side effects.

Answer 2

If you want to convert something like:

if(A) {
    return X;
}
else if(B) {
    return Y;
}
else {
    return Z;
}

You can write this as:

A ? X : (B ? Y : Z);

You thus write the else if as a condition in the else -part (after : ) of the upper expression.

However, I would strongly advice against too much cascading. The code becomes extremely unreadable and the ? : ? : code structure was never designed for this.

Answer 3

The ":" is the else

(one == two) ? "do this" : "do that"

If one equals two then "do this", otherwise (if one not equals two) than "do that".

Answer 4

I sometimes use Maps for such situations:

private final static Map <String, String> codesMap = <generate the map with values>
...
codesMap.get(one)

Answer 5

Yes, Above statement can be written using if-else. Here Ternary operator is used.

if(one==two)
 {
    //Code
 }
else
 {
    //code
 }

Ternary operator reduces Line Of Code(LOC) by writing condition in one statement instead of many using "? :".

For more information please refer:

http://java.meritcampus.com/t/48/Ternary-operator?tc=mm71

http://java.meritcampus.com/t/60/If-else-if-ladder?tc=mm72

Answer 6

This works like an if-else-statement but technically you could convert this into an if-else-statement . That would look like this:

if (one == two) {
"do this"
} else {
"do that"
}

if your question is whether or not you could insert an if statement into (one == two) ? "do this" : "do this" (one == two) ? "do this" : "do this" ... no, rather you should use nested if statements.