Object-oriented computing time (9) within the range of random numbers to find a difference Law

Topic 1: calculate your birth date number of days from today?

First, the source

date.java

/ ** Date of Birth calculated elapsed day number 
 * 1 Method 
 * / 
Package cn.edu.ccut.w1120t1;
 Import the java.util.Calendar;
 Import java.util.Date;
 Import java.util.Scanner;
 public  class DATE {
     public  static  void main (String [] args) { 
        Scanner Reader = new new Scanner (System.in); 
        System.out.print ( "Please enter your birth date - year, month, day three values \ the n-" );
         int = year reader.nextInt ();
         int month The = reader.nextInt ();
         int Day reader.nextInt = (); //Acquires date of birth from the keyboard 
        Calendar Birthday Calendar.getInstance = (); // initialize a calendar object 
        birthday.set (year, month The-. 1, Day); // set the calendar is the birthday 
        Long MSl birthday.getTimeInMillis = (); / / calculated value of time in milliseconds from the 1970.01.01.00:00:00 
        calendar nowday Calendar.getInstance = (); // initialize a calendar object 
        nowday.setTime ( new new a Date ()); // set the value of the current calendar time 
        Long MS2 = (nowday.getTimeInMillis () - MSl) / 1000/60/60/24; // calculate days apart 
        System.out.print ( "date of birth from today" + ms2 + "days" ); 
    } 
}

Second, the success Screenshots

Problem 2: randomly generating a random integer number between [1,100]. [30,70]? What is the law?

First, the source

number.java

/ ** Title 2: randomly generating a random integer number between [1,100]. [30,70]? What is the law? 
 Method 1 * 
 * / 
Package cn.edu.ccut.w1120t2;
 public  class Number {
     public  static  void main (String [] args) { 
        of System.out.print ( "50 integer random number between [1,100] is: \ n-\ n-" );
         int SUM = 0; // general law counter 
        int SUM1 = 0; // every ten counter law 
        for ( int I =. 1; I <= 50; I ++ ) {
             int NUM = ( int ) ( math.random () * + 100. 1); // randomly generates an integer random number between [1,100] 
            IF (NUM> && NUM = 30 <= 70) { //Determines whether [30, 70] 
                of System.out.print (NUM + "" ); 
                SUM ++; SUM1 ++ ; 
            } the else { 
                of System.out.print (NUM + "" ); 
            } 
            IF (I / 10> 0 && I 10% 0 == ) { 
                of System.out.print ( "\ N10 has a" + sum1 + "th in [30, 70] \ n-\ n-" ); 
                SUM1 = 0 ; 
            } 
        } 
        of System.out.print ( "50 th there are "+ sum +" therebetween th " ); 
    } 
}

Second, the success Screenshots