我的程序不允许我在构造函数中请求用户输入

Question

我正在为数字时钟创建一堆方法和构造函数，我正在尝试创建一个用户输入所有内容的方法，但程序不允许我请求用户输入。

import java.util.Scanner;

 import java.util.Calendar;

 public class DigitalClock {

 Calendar calendar = Calendar.getInstance();

 int hour = 0;

 int minute = 0;

 boolean am = true;


 public DigitalClock() {
    hour = 12;
    minute = 0;
    am = true;
 }

 public void setTime() {
hour = input.nextInt();
minute = input.nextInt();

}
public void getHour() {
hour = calendar.get(Calendar.HOUR_OF_DAY); 
}

public void getMinute() {
minute = calendar.get(Calendar.MINUTE);
}

public void isMorning() {
if(hour > 12){
am = false;
}else{
am = true;
}


}




}

Answer 1

Scanner object is not used. Main method is missing as well.

Scanner input = new Scanner(System.in); needs to be added. Add a println to ask for inputs.

example: 

Scanner input= new Scanner(System.in);  // Read from System.in
System.out.println("Enter the Hour: ");
hour = input.nextInt(); // Scans the input as an int.

input.close();