Setting boolean variable to condition?

Question

Is there any noticeable difference between

boolean foo= bar>1;

and

boolean foo = bar>1? true:false;

I have noticed that in the first example, the condition is evaluated immediately, looking something like this.

int bar=3;
boolean foo= bar>1;
bar =0;
if(foo){
    System.out.println("Foobar");
}

Would print Foobar, whereas if the condition were to be inside the if statement, it would not print at all. This so far is identical to giving the boolean variable a true/false value from the start with the ternary operator or if/else

Makoto · Accepted Answer · 2017-10-15 04:14:46Z

3

The ternary is highly redundant. Given that the inequality will return a boolean result, you do not need to perform any kind of ternary operation on it whatsoever.

answered Oct 15, 2017 at 4:14

Makoto

107k29 gold badges199 silver badges236 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Ben Over a year ago

That's what I thought, because I knew it wasn't evaluating the variable inside the if statement, I was just making sure there wasn't any extra nuance to it.

Shafin Mahmud · Accepted Answer · 2017-10-15 04:48:44Z

1

One thing I like to add along with, both of the code will generate the same bytecode. For the proof you can use the Java Class File Disassembler (javap)

use the command to disassemble the class files javap -c com.package.MyClass and you will find for the both of the code JVM will generate the same bytecode. Hence there is No benefit or harm for either of the two statement. But definitely ternary here is redaundant

answered Oct 15, 2017 at 4:48

Shafin Mahmud

4,0911 gold badge25 silver badges37 bronze badges

Collectives™ on Stack Overflow

Setting boolean variable to condition?

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related