Replacing last character in a String with java

Question

I have a string:

String fieldName = "A=2,B=3 and C=3,"; 

Now I want to replace last , with space.

I have used:

if (fieldName.endsWith(",")) {     fieldName.replace(",", " ");     fieldName = fieldName.replace((char) (fieldName.length() - 1), 'r'); }  System.out.println("fieldName = " + fieldName); 

But still I am getting the same old string. How I can get this output instead?

fieldName = A=2,B=3 and C=3 

Answer 1

You can simply use substring:

if(fieldName.endsWith(",")) {   fieldName = fieldName.substring(0,fieldName.length() - 1); } 

Make sure to reassign your field after performing substring as Strings are immutable in java

Answer 2

i want to replace last ',' with space

if (fieldName.endsWith(",")) {     fieldName = fieldName.substring(0, fieldName.length() - 1) + " "; } 

If you want to remove the trailing comma, simply get rid of the + " ".