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Use Collections.isEmpty() instead of .size() == 0

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Ensure that Collections.isEmpty() is used to check if there are no
elements in a collections. This is more explicit and can be faster than
calling .size().

Closes gh-4783
This commit is contained in:
Kirill Vlasov
2015-12-09 15:23:19 +05:00
committed by Phillip Webb
parent 6113643cbe
commit 786aacf2e9
19 changed files with 23 additions and 23 deletions
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4
spring-boot-samples/spring-boot-sample-websocket-undertow/src/main/java/samples/websocket/undertow/snake/SnakeTimer.java
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@@ -42,7 +42,7 @@ public class SnakeTimer {
private static final ConcurrentHashMap<Integer, Snake> snakes = new ConcurrentHashMap<Integer, Snake>();
public static synchronized void addSnake(Snake snake) {
if (snakes.size() == 0) {
if (snakes.isEmpty()) {
startTimer();
}
snakes.put(Integer.valueOf(snake.getId()), snake);
@@ -54,7 +54,7 @@ public class SnakeTimer {
public static synchronized void removeSnake(Snake snake) {
snakes.remove(Integer.valueOf(snake.getId()));
if (snakes.size() == 0) {
if (snakes.isEmpty()) {
stopTimer();
}
}