Use Formatter to vertically align numeric values. : Formatter Specifiers « Development « Java Tutorial

1. Java Tutorial
2. Development
3. Formatter Specifiers

import java.util.Formatter;

public class Main {
  public static void main(String[] argv) throws Exception {
    double data[] = { 12.3, 45.6, -7.89, -1.0, 1.01 };
    Formatter fmt = new Formatter();

    fmt.format("%12s %12s\n", "Value", "Cube Root");

    for (double v : data) {
      fmt.format("%12.4f %12.4f\n", v, Math.cbrt(v));
    }
    System.out.println(fmt);
  }
}
/*       Value    Cube Root
     12.3000       2.3084
     45.6000       3.5726
     -7.8900      -1.9908
     -1.0000      -1.0000
      1.0100       1.0033

*/