converting Java to Objective-C

hello
student converting java program objective-c. kinda hard, need pass subject. have little problem regarding ".add" of java. read lot of posts , books understand it. still have hard time understanding. check if did correct , if can lend me hand in converting. please? thanks.

here java code:

code:

arraylist cid = new arraylist(); arraylist sid = new arraylist(); arraylist<string> sol = new arraylist<string>();  public mainprogram() { initcomponents(); //.add (cartesian product principle) sid.add("sink"); cid.add("1 /x"); 

here solution in objective-c:

code:

nsarray *cid = [[nsarray alloc]init]; nsarray *sid = [[nsarray alloc]init]; nsmutablearray *sol = [[nsmutablearray array]; (my first trial in .add) cid addobject: @"1/x"; -----but shows error: "expected ';' before 'addobject'" (the other trial is) [sid addobject: @"sink"]; -------but shows error: "local declaration of sid hides instance variable" "nsarray may not respond '-addobject'." 

 

we not homework/assignments you. don't expect give explicit, straight-up answer here. expect people understand enough able yourself.


let's start of 2 thing.


firstly, difference between nsarray , nsmutablearray? if don't know, check out class references @ http://developer.apple.com/library/...oa/reference/foundation/classes/nsarray_class , http://developer.apple.com/library/...rence/foundation/classes/nsmutablearray_class.

if you're going try add object array, think you'll need? type of objects sid , cid pointing to? should be? how them should be?


second how send message (call method) of object in objective-c? what's syntax? how did violate syntax in first attempt?


there's more wrong code this, let's start this.

 

Forums Macs Mac Programming

• iPhone
• Mac OS & System Software
• iPad
• Apple Watch
• Notebooks
• iTunes
• Apple ID
• iCloud
• Desktop Computers
• Apple Music
• Professional Applications
• iPod
• iWork
• Apple TV
• iLife
• Wireless