시스템제어

1번문제) 두개의 정수를 입력받아, 첫번째 숫자부터 두번째 숫자 사이의 모든 짝수의 합을   구하는 프로그램을 작성하라
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import java.io.*;

class ThreeExm1{
 public static void main(String[] args) throws IOException{
  BufferedReader stdin=new BufferedReader
    (new InputStreamReader(System.in));
  int num1,num2;
  int between1=0;

  System.out.print("Enter the first number : ");
  num1 = Integer.parseInt (stdin.readLine());

         System.out.print ("Enter the second number : ");
         num2 = Integer.parseInt (stdin.readLine());
  
  if(num1<num2)
  {
   for(int i=num1;i<=num2;++i)
   {
    if((i%2)==0)
    {
     between1+=i;
    }
   } 
  }
  if(num1>num2)
  {
   for(int i=num2;num1>=i;++i)
   {
    if((i%2)==0)
    {
     between1+=i;
    }
   } 
  }

  System.out.println ("between even number : "+ between1);
 }//main

}//class

package sms.it;

class RunnableEx implements Runnable{

 @Override
 public void run() {
  // TODO Auto-generated method stub
  int i=0;
  while(true){
   System.out.println("스레드명: "+Thread.currentThread().getName()+"숫자: "+ i++);
   if(i==50)
    break;
   try{
    Thread.sleep(10);
   }catch(Exception e){
    e.printStackTrace();
   }
  }
  
 }
 
}

public class RunnableTestTwo {

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  RunnableEx r1=new RunnableEx();
  RunnableEx r2=new RunnableEx();
  RunnableEx r3=new RunnableEx();
  
  Thread t1=new Thread(r1,"Thread1");
  Thread t2=new Thread(r2,"Thread2");
  Thread t3=new Thread(r3,"Thread3");
  t1.start();
  t2.start();
  t3.start();
  
 }

}