下面是我根据本主题中显示的提示制作的部分代码。 希望能有所帮助。

(请随时提出任何建议来改进此代码，请告诉我)

柜台:

public class InstanceCount{
    private static Map<Integer, CounterInstanceLog> instanceMap = new HashMap<Integer, CounterInstanceLog>();
private CounterInstanceLog counterInstanceLog;


    public void count() {
        counterInstanceLog= new counterInstanceLog();
    if(counterInstanceLog.getIdHashCode() != 0){
    try {
        if (instanceMap .containsKey(counterInstanceLog.getIdHashCode())) {
         counterInstanceLog= instanceMap .get(counterInstanceLog.getIdHashCode());
    }

    counterInstanceLog.incrementCounter();

            instanceMap .put(counterInstanceLog.getIdHashCode(), counterInstanceLog);
    }

    (...)
}

对象是:

public class CounterInstanceLog{
    private int idHashCode;
    private StackTraceElement[] arrayStackTraceElements;
    private int instanceCount;
    private String callerClassName;

    private StackTraceElement getProjectClasses(int depth) {
      if(depth< 10){
        getCallerClassName(sun.reflect.Reflection.getCallerClass(depth).getName());
        if(getCallerClassName().startsWith("com.yourproject.model")){
            setStackTraceElements(Thread.currentThread().getStackTrace());
            setIdHashCode();
        return arrayStackTraceElements[depth];
        }
        //+2 because one new item are added to the stackflow
        return getProjectClasses(profundidade+2);           
      }else{
        return null;
      }
    }

    private void setIdHashCode() {
        if(getNomeClasse() != null){
            this.idHashCode = (getCallerClassName()).hashCode();
        }
    }

    public void incrementaContador() {
    this.instanceCount++;
}

    //getters and setters

    (...)



}

Oneliner:

Thread.currentThread().getStackTrace()[2].getMethodName()

注意，您可能需要将2替换为1。

我以前做过。您可以只创建一个新的异常，并在不抛出异常的情况下获取其堆栈跟踪，然后检查堆栈跟踪。正如另一个答案所说，这是非常昂贵的——不要在一个紧密的循环中进行。

我以前在一个性能不太重要的应用程序上为一个日志实用程序做过这样的操作(实际上，性能几乎不太重要——只要你将结果显示给一个动作，比如快速单击按钮)。

这是在你可以得到堆栈跟踪之前，异常只是有. printstacktrace()，所以我必须重定向系统。输出到我自己创建的流，然后(new Exception()).printStackTrace();重定向系统。返回并解析流。有趣的东西。

     /**
       * Get the method name for a depth in call stack. <br />
       * Utility function
       * @param depth depth in the call stack (0 means current method, 1 means call method, ...)
       * @return method name
       */
      public static String getMethodName(final int depth)
      {
        final StackTraceElement[] ste = new Throwable().getStackTrace();

        //System. out.println(ste[ste.length-depth].getClassName()+"#"+ste[ste.length-depth].getMethodName());
        return ste[ste.length - depth].getMethodName();
      }

例如，如果你试图获得用于调试目的的调用方法行，你需要通过编写这些静态方法的Utility类: (旧的java1.4代码，只是为了说明StackTraceElement的潜在用法)

        /**
          * Returns the first "[class#method(line)]: " of the first class not equal to "StackTraceUtils". <br />
          * From the Stack Trace.
          * @return "[class#method(line)]: " (never empty, first class past StackTraceUtils)
          */
        public static String getClassMethodLine()
        {
            return getClassMethodLine(null);
        }

        /**
          * Returns the first "[class#method(line)]: " of the first class not equal to "StackTraceUtils" and aclass. <br />
          * Allows to get past a certain class.
          * @param aclass class to get pass in the stack trace. If null, only try to get past StackTraceUtils. 
          * @return "[class#method(line)]: " (never empty, because if aclass is not found, returns first class past StackTraceUtils)
          */
        public static String getClassMethodLine(final Class aclass)
        {
            final StackTraceElement st = getCallingStackTraceElement(aclass);
            final String amsg = "[" + st.getClassName() + "#" + st.getMethodName() + "(" + st.getLineNumber()
            +")] <" + Thread.currentThread().getName() + ">: ";
            return amsg;
        }

     /**
       * Returns the first stack trace element of the first class not equal to "StackTraceUtils" or "LogUtils" and aClass. <br />
       * Stored in array of the callstack. <br />
       * Allows to get past a certain class.
       * @param aclass class to get pass in the stack trace. If null, only try to get past StackTraceUtils. 
       * @return stackTraceElement (never null, because if aClass is not found, returns first class past StackTraceUtils)
       * @throws AssertionFailedException if resulting statckTrace is null (RuntimeException)
       */
      public static StackTraceElement getCallingStackTraceElement(final Class aclass)
      {
        final Throwable           t         = new Throwable();
        final StackTraceElement[] ste       = t.getStackTrace();
        int index = 1;
        final int limit = ste.length;
        StackTraceElement   st        = ste[index];
        String              className = st.getClassName();
        boolean aclassfound = false;
        if(aclass == null)
        {
            aclassfound = true;
        }
        StackTraceElement   resst = null;
        while(index < limit)
        {
            if(shouldExamine(className, aclass) == true)
            {
                if(resst == null)
                {
                    resst = st;
                }
                if(aclassfound == true)
                {
                    final StackTraceElement ast = onClassfound(aclass, className, st);
                    if(ast != null)
                    {
                        resst = ast;
                        break;
                    }
                }
                else
                {
                    if(aclass != null && aclass.getName().equals(className) == true)
                    {
                        aclassfound = true;
                    }
                }
            }
            index = index + 1;
            st        = ste[index];
            className = st.getClassName();
        }
        if(resst == null) 
        {
            //Assert.isNotNull(resst, "stack trace should null"); //NO OTHERWISE circular dependencies 
            throw new AssertionFailedException(StackTraceUtils.getClassMethodLine() + " null argument:" + "stack trace should null"); //$NON-NLS-1$
        }
        return resst;
      }

      static private boolean shouldExamine(String className, Class aclass)
      {
          final boolean res = StackTraceUtils.class.getName().equals(className) == false && (className.endsWith("LogUtils"
            ) == false || (aclass !=null && aclass.getName().endsWith("LogUtils")));
          return res;
      }

      static private StackTraceElement onClassfound(Class aclass, String className, StackTraceElement st)
      {
          StackTraceElement   resst = null;
          if(aclass != null && aclass.getName().equals(className) == false)
          {
              resst = st;
          }
          if(aclass == null)
          {
              resst = st;
          }
          return resst;
      }

private void parseExceptionContents(
      final Exception exception,
      final OutputStream out)
   {
      final StackTraceElement[] stackTrace = exception.getStackTrace();
      int index = 0;
      for (StackTraceElement element : stackTrace)
      {
         final String exceptionMsg =
              "Exception thrown from " + element.getMethodName()
            + " in class " + element.getClassName() + " [on line number "
            + element.getLineNumber() + " of file " + element.getFileName() + "]";
         try
         {
            out.write((headerLine + newLine).getBytes());
            out.write((headerTitlePortion + index++ + newLine).getBytes() );
            out.write((headerLine + newLine).getBytes());
            out.write((exceptionMsg + newLine + newLine).getBytes());
            out.write(
               ("Exception.toString: " + element.toString() + newLine).getBytes());
         }
         catch (IOException ioEx)
         {
            System.err.println(
                 "IOException encountered while trying to write "
               + "StackTraceElement data to provided OutputStream.\n"
               + ioEx.getMessage() );
         }
      }
   }

Java 9 - JEP 259:栈遍历API

JEP 259为堆栈遍历提供了一个有效的标准API，允许对堆栈跟踪中的信息进行轻松过滤和延迟访问。在栈遍历API之前，访问栈帧的常见方法有:

的数组返回 包含类名和方法的StackTraceElement对象 每个堆栈跟踪元素的名称。 SecurityManager::getClassContext是一个受保护的方法 SecurityManager的子类来访问类上下文。 JDK-internal sun.reflect。Reflection::getCallerClass方法，你不应该使用它

使用这些api通常效率很低:

这些api要求VM急切地捕获整个快照 堆栈，它们返回表示整个堆栈的信息。 没有办法避免检查所有帧的代价，如果 调用者只对堆栈上的前几帧感兴趣。

为了找到直接调用者的类，首先获取一个StackWalker:

StackWalker walker = StackWalker
                           .getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE);

然后调用getCallerClass():

Class<?> callerClass = walker.getCallerClass();

或者遍历StackFrame并获得前面的第一个StackFrame:

walker.walk(frames -> frames
      .map(StackWalker.StackFrame::getDeclaringClass)
      .skip(1)
      .findFirst());