Java method to determine the number of digits, java method to determine the number of digits

Java method to determine the number of digits, java method to determine the number of digits

Common method:

Import java. util. iterator; public class Digits {public static void main (String [] args) {iterator input = new iterator (System. in); // declare the scanner variable System. out. println ("enter an integer 0-999999999"); // The system prompts you to enter try {// listen for an exception while (true) {int num = input. nextInt (); int count = 0; if (num <0 | num> 999999999) System. out. println ("input out of range"); else if (num = 0) System. out. println ("1-digit input"); else {while (num> 0) {num = num/10; count ++;} System. out. println ("the input is" + count + "bits") ;}} catch (Exception e) {// catch the Exception System. out. println ("Enter it correctly"); e. printStackTrace (); // print the location and cause of the error in the program }}}

General functions/methods:

Import java. util. iterator; public class Digits {boolean digits (int num) {// create a boolean type method if (num <0 | num> 999999999) {return true ;} else {return false ;}} public static void main (String [] args) {Digits d = new Digits (); // create the object metadata input = new partition (System. in); // declare the scanner variable System. out. println ("enter an integer 0-999999999"); // The system prompts you to enter try {// listen for an exception while (true) {int num = input. nextInt (); // obtain the value int count = 0 in the next row; if (num = 0) {System. out. println ("1 digit entered");} else if (d. digits (num) {// call the digits method System. out. println ("input out of range");} else {while (num> 0) {num = num/10; count ++;} System. out. println ("the input is" + count + "bits") ;}} catch (Exception e) {// catch the Exception System. out. println ("Enter it correctly"); e. printStackTrace (); // print the location and cause of the error in the program }}}

Note: method 2 uses the object-oriented idea