Convert between polar and rectangular coordinates

strictfp class MainClass {
  public static void main(String[] args) {
    double num, loge, log10, aloge, alog10;

    // Obtain input from user
    num = 0.111d;

    // Calculate and display the natural logarithm
    loge = Math.log(num);
    System.out.println("log base e = " + loge);
    // Calculate the common log
    log10 = Math.log(num) / Math.log(10.0);
    System.out.println("log base 10 = " + log10);

    // Calculate the antilogarithm of log base e
    aloge = Math.exp(loge);
    System.out.println("antilog of log base e = " + aloge);

    // Calculate the antilogarithm of log base 10
    alog10 = Math.pow(10.0, log10);
    System.out.println("anitlog of log base 10 = " + alog10);
  }
}