Java 为什么可以'；我一次不能运行多个线程吗？

我有一个SpringBoot应用程序，我试图读取多个读卡器，然后根据读卡器的输出执行某些数据库操作。在我创建一个运行组件的类之前，它一直工作得很好。现在我得到了一个arrayindexoutofboundsexception。这是密码

有错误的方法：

private void Start() throws AlienReaderException, IOException{
    ThreadStop = false;

     service= new MessageListenerService(3900);
     service.setMessageListener(this);
     service.startService();
    System.out.println("length of readers: "+Reader.ipAddress.length);

      for (lastThreadId = 0; lastThreadId < Reader.ipAddress.length; 
lastThreadId++)
      {
          **m_inventory[lastThreadId] = new 
AlienReader(Reader.ipAddress[lastThreadId], Reader.port, 
Reader.username[lastThreadId], Reader.password[lastThreadId]);**
          log.info("taginventory reader: "+ 
Reader.ipAddress[lastThreadId]+"Thread: "+lastThreadId);
          m_run_process[lastThreadId] = new Thread(new 
StartInventoryThread(Reader.ipAddress[lastThreadId], Reader.port, 
Reader.username[lastThreadId], Reader.password[lastThreadId], 
m_inventory[lastThreadId]));
          m_run_process[lastThreadId].start();
      }
      --lastThreadId;

      try
      {
          Thread.sleep(1000);
      }
      catch (Exception ex)
      {
          ex.getMessage();
      }


}

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tagInventory' defined in file [C:\Users\rcollins\Workspaces\MyEclipse 2017 CI\rfidreader\target\classes\com\rfidreader\rfidbusiness\TagInventory.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.rfidreader.rfidbusiness.TagInventory]: Constructor threw exception; nested exception is java.lang.ArrayIndexOutOfBoundsException: 2
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1238) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1137) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at com.rfidreader.RfidreaderApplication.main(RfidreaderApplication.java:27) [classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.rfidreader.rfidbusiness.TagInventory]: Constructor threw exception; nested exception is java.lang.ArrayIndexOutOfBoundsException: 2
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:182) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1230) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    ... 17 common frames omitted
Caused by: java.lang.ArrayIndexOutOfBoundsException: 2
    at com.rfidreader.rfidbusiness.TagInventory.Start(TagInventory.java:139) ~[classes/:na]
    at com.rfidreader.rfidbusiness.TagInventory.<init>(TagInventory.java:96) ~[classes/:na]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_112]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_112]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_112]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_112]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:170) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    ... 19 common frames omitted

错误：

private void Start() throws AlienReaderException, IOException{
    ThreadStop = false;

     service= new MessageListenerService(3900);
     service.setMessageListener(this);
     service.startService();
    System.out.println("length of readers: "+Reader.ipAddress.length);

      for (lastThreadId = 0; lastThreadId < Reader.ipAddress.length; 
lastThreadId++)
      {
          **m_inventory[lastThreadId] = new 
AlienReader(Reader.ipAddress[lastThreadId], Reader.port, 
Reader.username[lastThreadId], Reader.password[lastThreadId]);**
          log.info("taginventory reader: "+ 
Reader.ipAddress[lastThreadId]+"Thread: "+lastThreadId);
          m_run_process[lastThreadId] = new Thread(new 
StartInventoryThread(Reader.ipAddress[lastThreadId], Reader.port, 
Reader.username[lastThreadId], Reader.password[lastThreadId], 
m_inventory[lastThreadId]));
          m_run_process[lastThreadId].start();
      }
      --lastThreadId;

      try
      {
          Thread.sleep(1000);
      }
      catch (Exception ex)
      {
          ex.getMessage();
      }


}

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tagInventory' defined in file [C:\Users\rcollins\Workspaces\MyEclipse 2017 CI\rfidreader\target\classes\com\rfidreader\rfidbusiness\TagInventory.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.rfidreader.rfidbusiness.TagInventory]: Constructor threw exception; nested exception is java.lang.ArrayIndexOutOfBoundsException: 2
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1238) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1137) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at com.rfidreader.RfidreaderApplication.main(RfidreaderApplication.java:27) [classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.rfidreader.rfidbusiness.TagInventory]: Constructor threw exception; nested exception is java.lang.ArrayIndexOutOfBoundsException: 2
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:182) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1230) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    ... 17 common frames omitted
Caused by: java.lang.ArrayIndexOutOfBoundsException: 2
    at com.rfidreader.rfidbusiness.TagInventory.Start(TagInventory.java:139) ~[classes/:na]
    at com.rfidreader.rfidbusiness.TagInventory.<init>(TagInventory.java:96) ~[classes/:na]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_112]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_112]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_112]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_112]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:170) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    ... 19 common frames omitted

org.springframework.beans.factory.BeanCreationException:创建名为“tagInventory”的bean时出错[C:\Users\rcollins\Workspaces\MyEclipse 2017 CI\rfidreader\target\classes\com\rfidreader\rfidbusiness\tagInventory.class]：bean实例化失败；嵌套异常为org.springframework.beans.beanstantiationException:未能实例化[com.rfidreader.rfidbusiness.TagInventory]：构造函数引发异常；嵌套异常为java.lang.ArrayIndexOutOfBoundsException:2
在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.InstanceBean（AbstractAutowireCapableBeanFactory.java:1238）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:1137）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:543）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:503）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0（AbstractBeanFactory.java:317）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:222）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:315）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:199）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.DefaultListableBeanFactory.PreInstanceSingleton（DefaultListableBeanFactory.java:760）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:869）~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:550）~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh（ServletWebServerApplicationContext.java:140）~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
在org.springframework.boot.SpringApplication.refresh（SpringApplication.java:759）[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
位于org.springframework.boot.SpringApplication.refreshContext（SpringApplication.java:395）[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
在org.springframework.boot.SpringApplication.run（SpringApplication.java:327）[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
在org.springframework.boot.SpringApplication.run（SpringApplication.java:1255）[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
在org.springframework.boot.SpringApplication.run（SpringApplication.java:1243）[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
在com.rfidreader.RfidreaderApplication.main（RfidreaderApplication.java:27）[classes/：na]
原因：org.springframework.beans.beanstantiationException:未能实例化[com.rfidreader.rfidbusiness.TagInventory]：构造函数引发异常；嵌套异常为java.lang.ArrayIndexOutOfBoundsException:2
在org.springframework.beans.BeanUtils.instanceClass（BeanUtils.java:182）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.SimpleInstallationStrategy.instantiate（SimpleInstallationStrategy.java:87）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.InstanceBean（AbstractAutowireCapableBeanFactory.java:1230）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
... 省略17个公共框架
原因：java.lang.ArrayIndexOutOfBoundsException:2
在com.rfidreader.rfidbusiness.TagInventory.Start（TagInventory.java:139）~[classes/:na]
在com.rfidreader.rfidbusiness.TagInventory.（TagInventory.java:96）~[classes/:na]
在sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）~[na:1.8.0_112]
在sun.reflect.nativeconstructoraccessormpl.newInstance（nativeconstructoraccessormpl.java:62）~[na:1.8.0\u 112]
在sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）~[na:1.8.0112]
在java.lang.reflect.Constructor.newInstance（Constructor.java:423）~[na:1.8.0_112]
在org.springframework.beans.BeanUtils.instanceClass（BeanUtils.java:170）~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
... 省略19个公共框架

期望有人在没有其他信息的情况下通读380行的类来解决您的问题是不合理的。请您提供有关错误的更多信息，包括带有行号的stacktrace。如果可能的话，试着将您要求人们阅读和理解的代码限制为仅与您试图解决的错误相关的代码。您自己尝试管理线程有什么原因吗？除非您有限制，否则我强烈建议您不要尝试自己管理它，而是使用一些高级并发抽象