Using JSweet to Transpile Java->JS, 'matches' error

Question

I'm new to JS. I've written two large Java classes that I want to turn into JS using JSweet. The first smaller one transpiled without issue. With the second, I've hit a wall. It throws this error twice, and no others:

Line 55: property 'matches' does not exist on type 'string'. Did you mean 'match'?

Line 55 in my class is as follows:

private String name;

name is at the class level, and given a value later by an object constructor, by which I mean it is contained within no other brackets besides the class. (It happens to be line 55 due to some previous skeleton classes I added before the class I'm transpiling to define dependancies)

My one theory was that the following line was causing the issues:

if(pointer.content.equals(sub_table.get_name()))

So I changed it to this:

if(pointer.content.compareTo(sub_table.get_name())==0)

The idea being that these are two different ways to compare strings, and matches vs. match in JS are also different ways to compare data, and that perhaps I was trying to transpile a method that JS doesn't like. However, the error has not changed. Any clues?

Answer 1

The problem was line 350:

if((words[i - 2].matches("\\d*") && words[i-1].equals("+")) && words[i].matches("\\d*"))

I changed it to:

if((isNumeric(words[i - 2]) && words[i-1].equals("+")) && isNumeric(words[i]))

and I added isNumeric as a method:

public static boolean isNumeric(String strNum) {
    if (strNum == null) {
        return false;
    }
    try {
        int i = Integer.parseInt(strNum);
    } catch (NumberFormatException nfe) {
        return false;
    }
    return true;
}

Still don't understand why the error was showing on line 55. Matches works as intended in java, so js or jsweet just doesn't like it used like that.