将多行字符串强制转换为列表 <String> 在Java中

Question

One of the outputs of some Model class in my application comes as a multiline string of the following format:

System.out.println(str); //output:

row1
row2
row3
row4

There might be many values/lines in a string depending on the output, so str string is just for example purposes. I would like this string to be coerced into List<String> if possible, so the printed output will be shown as:

List<String> listStr = new ArrayList<String>();
System.out.println(listStr); //output:

[row1, row2, row3, row4]

I tried many different approaches eg:

for (Model modelRow : modelTableView.getItems()) {
            str = modelRow.getInfo();
            System.out.println(str);
            listStr = new ArrayList<String>(Arrays.asList(str.split("\n")));
}

In most cases only the last value is returned or I get single arrays for all values eg:

[row1]
[row2]
[row3]
[row4]

So, how can I have all values in one List only [row1, row2, row3, row4] ? What am I missing? Any help or directions would be appreciated.

EDIT

I avoided using a separator with a str.split() method and I queried the cells in the firstColumn within the modelTableView directly using the following:

for (int i=0; i < modelTableView.getItems().size(); i++) {
            str = firstColumn.getCellData(i);
            System.out.println(str);
            listStr = Arrays.asList(str);
}

The code doesn't return NullPointerException anymore and allows to continue, however the output of listStr is just the last element of the original str string:

System.out.println(listStr);
//output:
[row4]

Should I change an iterator within the loop? Any other idea what could go wrong?

Answer 1

Try something like this:

List<String> listStr = new ArrayList();
for (Model modelRow : modelTableView.getItems()) {
   str = modelRow.getInfo();
   System.out.println(str);
   listStr.addAll(Arrays.asList(str.split("\n")));
}

EDIT

If you just want to print an array in the way a List is printed, you could use:

Arrays.toString( array )