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;