Java 如何将文本添加到 JLabel
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How to add text to JLabel
提问by CaffeineToCode
I am creating a book reader, which takes the content of a file and sends it to an Object[]. I want this to be displayed, line by line on my page. I'm considering a loop of some sort that will add text to the label, but here's my question: How to I add text to the end of a JLabel, rather than setting the whole thing?
我正在创建一个图书阅读器，它获取文件的内容并将其发送到 Object[]。我希望在我的页面上逐行显示。我正在考虑将文本添加到标签的某种循环，但这是我的问题：如何将文本添加到 JLabel 的末尾，而不是设置整个内容？
采纳答案by chiastic-security
You can use getText()to retrieve what's there, and then setText()to set the new value.
您可以使用getText()来检索那里的内容，然后setText()设置新值。
So to add somethingto the end, you'd do
所以要添加something到最后，你会做
label.setText(label.getText()+"something");
Remember you'll probably be wanting to add a space in the middle. If you've got a new String stryou want to append, you will probably want
请记住，您可能希望在中间添加一个空格。如果你有一个新的String str想要追加，你可能会想要
label.setText(label.getText()+" "+str);
to make sure you add the space and then the contents of str.
确保添加空格，然后添加str.
回答by Arc
@chiastic-security answer is the better one. Here is another solution that I believe will save some memory.
@chiastic-security 答案是更好的答案。这是我认为可以节省一些内存的另一种解决方案。
StringBuilder sb = new StringBuilder();
Object[] objectArray;
for (Object o : objectArray) { // loop through the Object array
sb.append(o.toString() + " "); // append each index of the Object array to the StringBuilder
}
label.setText(sb.toString());
