Is String.replace implementation really efficient?

Question

I used to think that String.replace is faster than String.replaceAll because the latter uses Pattern regex and the former does not. But in fact there is no significant differenc

Answer 1

String replace and replace all method there is no diffrence in effiency or time both take n operation to replace the charecter following code may help you how string replace method work in java you can checkout in your eclipse

package com.jav.exec;

public class replace {

    static String s1="This the India the india the nation";

    public static String replace(String s2,String s3)
    {
        int counter=0;
        int count=s3.length()-1;
        int count1=0;
        char[] ca1=s1.toCharArray();
        char[] ca2=s2.toCharArray();
        char[] ca3=s3.toCharArray();

        for(int f1=0;f10)
                {   
                    ca4[f-counter]=ca1[count2-counter];
                    counter--;
                }
            }
            count2++;
        }
        return new String(ca4);
    }

    public static void main(String[] args)
    {
        System.out.println(replace("the","mother"));
    }
}