fix code

hutool-cron/src/main/java/org/dromara/hutool/cron/CronTimer.java

@@ -54,13 +54,13 @@ public class CronTimer extends Thread implements Serializable {
 		long thisTime = System.currentTimeMillis();
 		long nextTime;
 		long sleep;
-		while(! isStop){
+		while(!isStop){
 			//下一时间计算是按照上一个执行点开始时间计算的
 			//此处除以定时单位是为了清零单位以下部分，例如单位是分则秒和毫秒清零
 			nextTime = ((thisTime / timerUnit) + 1) * timerUnit;
 			sleep = nextTime - System.currentTimeMillis();
 			if(isValidSleepMillis(sleep, timerUnit)){
-				if (! ThreadUtil.safeSleep(sleep)) {
+				if (!ThreadUtil.safeSleep(sleep)) {
 					//等待直到下一个时间点，如果被中断直接退出Timer
 					break;
 				}

hutool-cron/src/main/java/org/dromara/hutool/cron/Scheduler.java

@@ -463,7 +463,7 @@ public class Scheduler implements Serializable {
 	public Scheduler stop(final boolean clearTasks) {
 		lock.lock();
 		try {
-			if (! started) {
+			if (!started) {
 				throw new IllegalStateException("Scheduler not started !");
 			}
 

hutool-cron/src/main/java/org/dromara/hutool/cron/pattern/CronPattern.java

@@ -162,7 +162,7 @@ public class CronPattern {
 	 */
 	public Calendar nextMatchAfter(final Calendar calendar) {
 		Calendar next = nextMatchAfter(PatternUtil.getFields(calendar, true), calendar.getTimeZone());
-		if (! match(next, true)) {
+		if (!match(next, true)) {
 			next.set(Calendar.DAY_OF_MONTH, next.get(Calendar.DAY_OF_MONTH) + 1);
 			next = CalendarUtil.beginOfDay(next);
 			return nextMatchAfter(next);

hutool-cron/src/main/java/org/dromara/hutool/cron/pattern/parser/PartParser.java

@@ -171,7 +171,7 @@ public class PartParser {
 		if (value.length() <= 2) {
 			//根据步进的第一个数字确定起始时间，类似于 12/3则从12（秒、分等）开始
 			int minValue = part.getMin();
-			if (! isMatchAllStr(value)) {
+			if (!isMatchAllStr(value)) {
 				minValue = Math.max(minValue, parseNumber(value));
 			} else {
 				//在全匹配模式下，如果步进不存在，表示步进为1

hutool-cron/src/main/java/org/dromara/hutool/cron/timingwheel/SystemTimer.java

@@ -70,7 +70,7 @@ public class SystemTimer {
 		bossThreadPool = ThreadUtil.newSingleExecutor();
 		bossThreadPool.submit(() -> {
 			while (true) {
-				if(! advanceClock()){
+				if(!advanceClock()){
 					break;
 				}
 			}
@@ -92,7 +92,7 @@ public class SystemTimer {
 	 */
 	public void addTask(final TimerTask timerTask) {
 		//添加失败任务直接执行
-		if (! timeWheel.addTask(timerTask)) {
+		if (!timeWheel.addTask(timerTask)) {
 			ThreadUtil.execAsync(timerTask.getTask());
 		}
 	}

hutool-cron/src/main/java/org/dromara/hutool/cron/timingwheel/TimerTaskList.java

@@ -105,7 +105,7 @@ public class TimerTaskList implements Delayed {
 	 */
 	public synchronized void flush(final Consumer<TimerTask> flush) {
 		TimerTask timerTask = root.next;
-		while (! timerTask.equals(root)) {
+		while (!timerTask.equals(root)) {
 			this.removeTask(timerTask);
 			flush.accept(timerTask);
 			timerTask = root.next;