how do you align numbers in java?

you must will try add a String variable… like…

String reglerAnnee;
...
// add a space if year(anne) is less than 10
// using a ternary operator, like an "if" but less code
reglerAnnee = annee < 10 ? " " : "";
..
// and add to the println ...
System.out.println("    "+reglerAnnee + annee + "     " + (int) capitalDeDepart 
                 + "$      " + (int) interet + "$             " 
                 + (int) nouveauCapital + "$");
...

The result will be like:

 1     10000$      1000$             11000$
 2     11000$      1100$             12100$
...
 9     21435$      2143$             23579$
10     23579$      2357$             25937$