From d7a0fdf1e88ddd72dec4d0f08cf68b8a7e009297 Mon Sep 17 00:00:00 2001
From: hengyunabc <hengyunabc@gmail.com>
Date: Fri, 7 May 2021 19:41:26 +0800
Subject: [PATCH] remove useless code.

---
 arthas-vmtool/src/main/java/arthas/VmTool.java       | 5 -----
 arthas-vmtool/src/main/java/arthas/VmToolMXBean.java | 4 ----
 arthas-vmtool/src/main/native/src/jni-library.cpp    | 6 ------
 3 files changed, 15 deletions(-)

diff --git a/arthas-vmtool/src/main/java/arthas/VmTool.java b/arthas-vmtool/src/main/java/arthas/VmTool.java
index 16ccd0d8f..a54974ba4 100644
--- a/arthas-vmtool/src/main/java/arthas/VmTool.java
+++ b/arthas-vmtool/src/main/java/arthas/VmTool.java
@@ -70,11 +70,6 @@ public class VmTool implements VmToolMXBean {
      */
     private static synchronized native Class<?>[] getAllLoadedClasses0(Class<?> klass);
 
-    @Override
-    public String check() {
-        return check0();
-    }
-
     @Override
     public void forceGc() {
         forceGc0();
diff --git a/arthas-vmtool/src/main/java/arthas/VmToolMXBean.java b/arthas-vmtool/src/main/java/arthas/VmToolMXBean.java
index 92df09be1..d1a18ab87 100644
--- a/arthas-vmtool/src/main/java/arthas/VmToolMXBean.java
+++ b/arthas-vmtool/src/main/java/arthas/VmToolMXBean.java
@@ -14,10 +14,6 @@ package arthas;
  * @author hengyunabc 2021-04-26
  */
 public interface VmToolMXBean {
-    /**
-     * 检测jni-lib是否正常，如果正常，应该输出OK
-     */
-    public String check();
 
     /**
      * https://docs.oracle.com/javase/8/docs/platform/jvmti/jvmti.html#ForceGarbageCollection
diff --git a/arthas-vmtool/src/main/native/src/jni-library.cpp b/arthas-vmtool/src/main/native/src/jni-library.cpp
index 6f9002f2a..9e64833b1 100644
--- a/arthas-vmtool/src/main/native/src/jni-library.cpp
+++ b/arthas-vmtool/src/main/native/src/jni-library.cpp
@@ -51,12 +51,6 @@ Java_arthas_VmTool_forceGc0(JNIEnv *env, jclass thisClass) {
     jvmti->ForceGarbageCollection();
 }
 
-extern "C"
-JNIEXPORT jstring JNICALL
-Java_arthas_VmTool_check0(JNIEnv *env, jclass thisClass) {
-    return env->NewStringUTF("OK");
-}
-
 extern "C"
 jlong getTag() {
     return ++tagCounter;