replace method in String class giving different output

Question

In core java API I studied the method replace(char oldChar,char newChar) in String class and it says that it will replace the oldChar with newChar in the string in each occurrence, buy this explanation output of this program given below should be

A B D C

But the real output is

A B C C

Can anyone explain me why this is happening so.

class A{
    public static void main(String[] args){
        String ta = "A ";
        ta = ta.concat("B ");
        String tb = "C ";
        ta = ta.concat(tb);
        ta.replace('C','D');
        ta = ta.concat(tb);
        System.out.println(ta);
    }
}

Surely there are about a billion duplicates of this question? Why two answers? — Bill Woodger, Jul 17 '16 at 07:42
@BillWoodger You can't 'earn' reputation, when you close questions as a duplicate instead of answering. And yes, it is sad that such trusted users do that. — Tom, Jul 17 '16 at 10:35

score 0 · Accepted Answer · answered Jul 17 '16 at 07:22

0

 ta.replace('C','D');

This line doesn't change ta. It returns a new string with that change made. You want

ta = ta.replace('C','D');

answered Jul 17 '16 at 07:22

Louis Wasserman

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replace method in String class giving different output

1 Answers1