Java - object for loop with condition?

Question

This may sound silly but I couldn't find an answer by googling it.

When using a for loop in it's simplest form I can add conditions to break the loop in the for statement. example:

for(int i=0; i<100 && condition2 && condition3; i++){
    //do stuff
}

When using an object for loop like this:

for(String s:string_table){
    //do stuff
}

how can i add a condition to break the loop? I'm talking about adding conditions in the for statement. I know I can add the condition inside //do stuff part and break from there.

You can't do that... The foreach construct is "fixed".

fge
– fge

2014-02-16 14:12:48 +00:00
Commented Feb 16, 2014 at 14:12 — fge
– fge, Commented Feb 16, 2014 at 14:12

Maroun · Accepted Answer · 2014-02-16 14:14:00Z

1

You cannot do that you have to go by putting the if statements in the for loop.

edited Feb 16, 2014 at 14:14

Maroun

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answered Feb 16, 2014 at 14:13

Girish

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2 Comments

Anonymous Over a year ago

that's too bad. it would make it much easier

Boann Over a year ago

@user3051067 It wouldn't. It would just make it one line shorter. If it upsets you that much, put the if-break on the same line as the opening brace and pretend it's part of the for syntax.

Boann · Accepted Answer · 2014-02-16 14:22:54Z

1

You cannot add anything else to the () part of the "enhanced for" statement. JLS § 14.14.2:

The enhanced for statement has the form:

for ( FormalParameter : Expression ) Statement

The type of the Expression must be Iterable or an array type.

(The "FormalParameter" means a variable declaration.)

The break; statement is the only way:

for (String s : string_table) {
    if (condition) break;
    // ...
}

edited Feb 16, 2014 at 14:22

answered Feb 16, 2014 at 14:12

Boann

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3 Comments

Maroun Over a year ago

+1. Now can you please explain why did you choose this avatar? :D

Sergey Kalinichenko Over a year ago

I would use if (!condition2 || !condition3) ... instead of if (condition) to match OP's code better.

Maroun Over a year ago

@Boann That's the last thing that I though about LOL.

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