API method for swapping characters inside a string in Java

Question

Is there a native method in Java to do character swapping inside Strings. I mean, I need to write a function like this everytime and its pretty boring:

    public static String modifyString(String str,int x,int y){

    char arr[]=str.toCharArray();
    char t= arr[x];
    arr[x]=arr[y];
    arr[y]=t;

    String s= new String(arr);
    return s;

}

Not a native way but some ideas: stackoverflow.com/questions/956199/… — assylias
– assylias, Commented Nov 16, 2012 at 13:19
native is probably not that best word to use since it has its own meaning in Java. — mre
– mre, Commented Nov 16, 2012 at 13:19
on an unrelated note, you can improve performance by using arr[x]^=arr[y]; arr[y]^=arr[x]; arr[x]^=arr[y]; — tckmn
– tckmn, Commented Nov 16, 2012 at 13:24
@PicklishDoorknob is that really faster than simple assignments? — assylias
– assylias, Commented Nov 16, 2012 at 13:42
Yes, you don't have to create a temp variable and they are both three commands. — tckmn
– tckmn, Commented Nov 16, 2012 at 13:42

mre · Accepted Answer · 2012-11-16 13:22:44Z

1

No, the String class does not contain a method for swapping characters. Unfortunately, you'll either need to roll your own, or look into using a third party library.

answered Nov 16, 2012 at 13:22

mre

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