How to replace all strings in a column with a string of specific length using tmap component

[JABELLA1634831127]

Say I want to replace all values in a column with a value of specific length in that column.

For this input column I only want my output to have "ABCDEFGHIJKL" for one column. How do I do this?

[JABELLA1634831127]

Thank you so much!

[JABELLA1634831127]

Sorry am still a newbie at talend. Do I still do this code: if(input_row.(yourfield)!=null && StringHandling.LEN

(input_row.(yourfield))==(your lengh value)

globalMap.put("SEIN",input_row.(yourfield));

And how can I put a filter condition or do this:

("SEIN").equals(row2.A)

and in SEIN column value row2.B.?

[JABELLA1634831127]

Hi so I was able to input a t_java_row but when I ran the job, the output would only show the column header SEIN. Attached are pictures for reference.