将文本附加到TextArea中 [英] Appending text into TextArea

问题描述

我正在尝试创建 TextArea ，

@FXML 
private TextArea ta;

以及我想要得到的东西：

and what I'm trying to get :

for (int i=1; i<=5; i++) {
    ta.setText("    Field " + i + "\n");
}

但它只显示最后一行：字段5 。

任何人都可以提供帮助。提前致谢。

but it only show the last line : Field 5.
Can anyone help. Thanks in advance.

推荐答案

当你打电话给 setText（...）时，你替换已经存在的文本。所以要么在设置之前构造你的String，要么追加它。
试试这个：

When you call setText( "..."), you replace the text which is already there. So either construct your String before setting it, or append it. Try this:

String text="";
for (int i=1;i<=5;i++) {
    text = text + "    Field "+i+"\n";
}
ta.setText(text);

注意：您可能会获得更好的性能，并且使用StringBuilder被认为是好习惯 而不是像这样构建String的String。但这应该可以帮助你理解问题所在，而不会让它变得过于复杂。

Note: You'll probably get better performance and it's considered "good practice" to use a "StringBuilder" instead of a String to build String like this. But this should help you understand what's the problem, without making it overly complicated.

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