I am trying to set up a macro in imagej but I am unfamiliar with the language

This is my script :

String directory = "dts/";
String[] list = getFileList(directory);

ArrayList<String> meanValuesList = new ArrayList<String>();

for (int i = 0; i < list.length; i++) {
open(directory + list[i]);
  run("Find Maxima...", "noise=0 output=[Point Selection]");
  run("Measure");
  meanValue = getResult("Mean", 0);
  meanValuesList.add(list[i] + ": " + meanValue);
    close();
}

for (j = 0; j < meanValuesList.size(); j++) {
    print(meanValuesList.get(j));
}

This is the error : ‘.’ expected in line 1:

Thank you for your help

I need my script to work, so I need to solve the problem