A file demonstrating some mathematical errors while using Java Primitives. See it in action here https://repl.it/repls/ClientsidePinkChords

Main.java

class Main {

  public static void testWithFloats() {
    System.out.println("testWithFloats\n");
    float a = 0.1f;
    float b = 0.1f;
    float c = 0.1f;

    float d = a + b + c;
    float e = d * 3;
    float f = d * 100000;

    System.out.println("a + b + c = d = " + d);
    System.out.println("e = " + e);
    System.out.println("f = " + f);
    System.out.println("");
  }

  public static void testWithDoubles() {
    System.out.println("testWithDoubles\n");

    double a = 0.1;
    double b = 0.1;
    double c = 0.1;

    double d = a + b + c;
    double e = d * 3;
    double f = d * 100000;

    System.out.println("a + b + c = d = " + d);
    System.out.println("e = " + e);
    System.out.println("f = " + f);
    System.out.println("");
  }

  public static void main(String[] args) {
    testWithFloats();
    testWithDoubles();
  }

}