如何像打印到控制台一样打印到JAVAFX GUI

Question

Trying to print data to a gui made by javafx.

...
for(Entry<Date, String> entry : tmap.entrySet()) {
    Date key = entry.getKey();
    String value = entry.getValue();

    System.out.println(key + " => " + value);

I do not want to use setText() as it wont act like in console, it will clear to only one text every loop of TreeMap

Answer 1

The only way to do this is by concatenating the original text with the new content and setting the resulting String using setText .

In your case you can improve the efficiency of doing this by using a StringBuilder :

StringBuilder sb = new StringBuilder(textNode.getText());

for(Entry<Date, String> entry : tmap.entrySet()) {
    Date key = entry.getKey();
    String value = entry.getValue();

    sb.append(key).append(" => ").append(value).append('\n');
    ...
}
textNode.setText(sb.toString());

---

In case you're using a TextInputControl , appendText may be worth a look, but in case you know you're adding multiple String s, StringBuilder is probably more efficient.

for(Entry<Date, String> entry : tmap.entrySet()) {
    Date key = entry.getKey();
    String value = entry.getValue();

    textNode.appendText(key + " => " + value + '\n');
    ...
}