Objective-C和Java基本功能比較

宣告物件變數
Objective-C:  Baby  *cuteBaby;
Java:   Baby  cuteBaby;
差異:  星字號

建立物件
Objective-C:  Baby  *cuteBaby = [[Baby alloc] initWithAge:3];
Java:  Baby cuteBaby = new Baby(10);

for loop
Objective-C:
for(NSString *str in array)
Java:
for (String str : array)

array
Objective-C:  NSMutableArray
NSMutableArray *array = [[NSMutableArray alloc] init];
array.count;
Java:  ArrayList
ArrayList list = new ArrayList();
list.size();

dic
Objective-C:  NSMutableDictionary
Java: HashMap
HashMap dic = new HaspMap();
dic.put("Peter", new Double(3434.34));


空物件
Objective-C:  nil
Java:  null

array使用
    array裡物件的數量
         Objective-C:  array.count
         Java:  array.size()