Fix gradle on java-oracle

settings.gradle

@@ -51,14 +51,18 @@ include(':mirai-plugins')
 include(':mirai-plugins:image-sender')
 
 def javaVersion = System.getProperty("java.version")
-try {
-    if (javaVersion.substring(0, javaVersion.indexOf(".")).toInteger() >= 11) {
+def versionPos = javaVersion.indexOf(".")
+if (versionPos==-1) versionPos = javaVersion.indexOf("-")
+if (versionPos==-1){
+    println("jdk version unknown")
+}else{
+    def javaVersionNum = javaVersion.substring(0, versionPos).toInteger()
+    if (javaVersionNum >= 11) {
+        println("jdk版本为 "+ javaVersionNum)
         include(':mirai-debug')
     } else {
         println("当前使用的 JDK 版本为 ${System.getProperty("java.version")}, 最低需要 JDK 11 才能引入模块 `:mirai-debug`")
     }
-} catch (Exception ignored) {
-    println("无法检测 JDK 版本, 将不会引入 `:mirai-debug`")
 }
 
 project(':mirai-demos:mirai-demo-1').projectDir = file('mirai-demos/mirai-demo-1')