如何在 ArrayList 的 textArea 中设置文本? [英] How to setText in a textArea from an ArrayList?

问题描述

我有一个 ArrayList ArrayListexternalDataList = new ArrayList<>(1600); 我想在 textArea 中显示前 3 个字符串，但我不能成功:

I have an ArrayList ArrayList<String> externalDataList = new ArrayList<>(1600);and I would like to display in a textArea first 3 strings, but I can't succed:

这是我的代码

textareaShowPreview.setPrefRowCount(3);

Iterator<String> it = externalDataList.iterator();
       int tot = 0;
       while(it.hasNext() && tot<3){
           String element = it.next();
           textareaShowPreview.setText(element + "\n");
           System.out.println("elements are: " + element);
           tot++;
       }

sout 正确打印前 3 个字符串

The sout correctly print first 3 strings

element are: 23/05/2007 ,30.9455,31.2545,30.9091,30.9545,7518142
element are: 24/05/2007 ,30.6545,31.0909,30.5364,30.6909,12851606
element are: 25/05/2007 ,30.6636,30.8545,30.4818,30.8091,9392088

但在 textArea 我只有第一个

but in textArea I have only first one

如何修改我的代码以在 textArea 中显示所有三个字符串，每行一个字符串?

How do I have to modify my code to show in textArea all three strings, one string per row?

推荐答案

使用 appendText 而不是 setText 这里是一个链接.

Use appendText instead of setText here is a link.

setText，删除之前的文本并设置你给它的文本.append 将当前文本保留在您的文本区域中.

The setText, delete the previous text and set the text you are giving to it. The append keep the current text in your text area.

希望能帮到你！

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