From Java To Objective-C: String

From Java To Objective C: Strings

My Notes (part 2)


This is a very short introduction from my notes.

A good and complete starting point can be found by google.


The String.


In java we have String Class that represent a string, in objective C there is a NSString object.

Each string constant double quote in objective-c must be prefixed by @

Also in objective C, NSString is immutable like java String.



.objective c version


  • NSString aString = @"hello world";

  • NSString aString2 = [[NSString alloc] initWithString:@"Hello World2"]; 
  • [aString release]; 

  • #define CONSTANT1 @"HELLO";

  • NSLog(@"debug string");

  • NSString *ageString = [NSString stringWithFormat:@"%@ concatenate with %@", "age:", 18];


.java version


  • String aString = "hello world";

  • String aString2 = new String("Hello World 2");

  • public static final String CONSTANT1 = "HELLO";

  • System.out.println("debug string");

  • String ageString = "age:" + " concatenate with " + 18;



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