CODEWITHSUNDEEP
c#javastringbuilder
peter.murray.rust
peter.murray.rust

Reputation: 38043

differences between StringBuilder in Java and C#

I am converting Java code to C#. The StringBuilder class in Java seems to have many more methods than the C# one. I am interested in (say) the Java functionality

sb.indexOf(s);
sb.charAt(i);
sb.deleteCharAt(i);

which seems to be missing in C#.

I suppose the first two could be modelled by

sb.ToString().IndexOf(s);
sb.ToString().CharAt(i);

but would the third operate on a copy of the contents of the sb rather than the actual contents?

Is there a common way of adding this functionality to all missing methods?

Upvotes: 4

Views: 3263

Answers (4)

codymanix
codymanix

Reputation: 29490

StringBuilder has an indexer, that means you can simply access single characters using sb[i]

Upvotes: 0

Yuriy Faktorovich
Yuriy Faktorovich

Reputation: 68687

You could use extension methods like the following:

    static class Extensions
    {
        public static int IndexOf(this StringBuilder sb, string value)
        {
            return sb.ToString().IndexOf(value);
        }

//if you must use CharAt instead of indexer
        public static int CharAt(this StringBuilder sb, int index)
        {
            return sb[index];
        }
    }

Upvotes: 1

Joe
Joe

Reputation: 42627

You can use the Chars member collection for .charAt. Similarly, you can use .Remove(i,1) to remove a single char at position i.

Upvotes: 6

Darin Dimitrov
Darin Dimitrov

Reputation: 1038820

For the third you could use the Remove method:

sb.Remove(i, 1);

Upvotes: 2

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