class FactorialModule { private int result; private int value; FactorialModule() {} FactorialModule(int x)//a constructor with one argument(parameterised constructor) { value = x; result = 1; } void calculation() { for(int i=1; i<=value; i++) { result = result *i; } } void display() { System.out.println("The factorial is " + result); } /* As this program first takes value from user then it will * start to run that is why it is call command line program * */ /* It will not run in eclipse. * We have to run this using console * */ } class FactorialRun { public static void main(String a[]) { int number1 = Integer.parseInt(a[0]); int number2 = Integer.parseInt(a[1]); FactorialModule fm1 = new FactorialModule(number1); FactorialModule fm2 = new FactorialModule(number2); FactorialModule fm3 = new FactorialModule(); fm1.calculation(); fm1.display(); fm2.calculation(); fm2.display(); } }