give me the solution
package com.codegym.task.task16.task1626;
public class Solution {
public static int number = 5;
public static void main(String[] args) {
new Thread(new CountdownRunnable(), "Decrease").start();
new Thread(new CountUpRunnable(), "Increase").start();
}
public static class CountUpRunnable implements Runnable{
private int countdownIndex = Solution.number;
private int countupIndex = 1;
public void run(){
try{
while(true){
System.out.println(Thread.currentThread().getName()+": "+countupIndex);
countdownIndex -= 1;
if (countdownIndex == 0) return;
Thread.sleep(500);
}
}catch(InterruptedException e){
}
}
}
public static class CountdownRunnable implements Runnable {
private int countdownIndex = Solution.number;
public void run() {
try {
while (true) {
System.out.println(toString());
countdownIndex -= 1;
if (countdownIndex == 0) return;
Thread.sleep(500);
}
} catch (InterruptedException e) {
}
}
public String toString() {
return Thread.currentThread().getName() + ": " + countdownIndex;
}
}
}