java-实时打印当前线程的调用堆栈 

/**
   * 打印当前线程的调用堆栈
   * 
   */
  void printTrack(){
    StackTraceElement[] st = Thread.currentThread().getStackTrace();
    if(st==null){
      System.out.println("无堆栈...");
      return;
    }
    StringBuffer sbf =new StringBuffer();
    for(StackTraceElement e:st){
      if(sbf.length()>0){
        sbf.append(" <- ");
        sbf.append(System.getProperty("line.separator"));
      }
      sbf.append(java.text.MessageFormat.format("{0}.{1}() {2}"
          ,e.getClassName()
          ,e.getMethodName()
          ,e.getLineNumber()));
    }
    System.out.println(sbf.toString());
  }