Input java?

Question

how to input with java and get the value?

Answer 1

Scanner variableName1 = new Scanner(System.in);

int input = variableName1.nextInt();
or
String input = variablename1.nextLine();
or
double unput = variableName1.nextDouble();

etc..

at the end.....

variableName1.close();

Answer 2

please explain