From 5965c682b45bdbe14647e577452353e397515e94 Mon Sep 17 00:00:00 2001
From: huoyo <1729913829@qq.com>
Date: Sun, 26 May 2024 19:40:49 +0800
Subject: [PATCH] fix a bug about getCpuUsage from romanticmj:master

---
 .../cn/langpy/kotime/service/ThreadUsageService.java     | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/main/java/cn/langpy/kotime/service/ThreadUsageService.java b/src/main/java/cn/langpy/kotime/service/ThreadUsageService.java
index 94d59c3..d778368 100644
--- a/src/main/java/cn/langpy/kotime/service/ThreadUsageService.java
+++ b/src/main/java/cn/langpy/kotime/service/ThreadUsageService.java
@@ -33,8 +33,13 @@ public class ThreadUsageService {
             Thread thread = threads[i];
             ThreadInfo threadInfo = new ThreadInfo();
             threadInfo.setId(thread.getId());
-            threadInfo.setCpuUsage(BigDecimal.valueOf(threadMXBean.getThreadCpuTime(thread.getId()))
-                    .divide(BigDecimal.valueOf(threadMXBean.getThreadUserTime(thread.getId())), 2, BigDecimal.ROUND_HALF_UP));
+            BigDecimal threadCpuTime = BigDecimal.valueOf(threadMXBean.getThreadCpuTime(thread.getId()));
+            BigDecimal threadUserTime = BigDecimal.valueOf(threadMXBean.getThreadUserTime(thread.getId()));
+            if (threadUserTime.doubleValue() > 0) {
+                threadInfo.setCpuUsage(threadCpuTime.divide(threadUserTime, 2, BigDecimal.ROUND_HALF_UP));
+            }else {
+                threadInfo.setCpuUsage(BigDecimal.ZERO);
+            }
             threadInfo.setName(thread.getName());
             threadInfo.setClassType(thread.getClass().getSimpleName());
             threadInfo.setState(thread.getState().name());