我想制作一个 Swing 程序来更新你所做的事情。它将所有信息写在一个不可编辑的JTextField.
例如：
You have changed the text to BLUE.
You have changed the text to RED.
问题是我不能把两条线分开。
我得到的是这样的：
You have changed the text to BLUE. You have changed the text to RED.
我试过的是这样的：（这不起作用）
TF_BetInfo.setText(TF_BetInfo.getText() + "\nYou have changed the text to BLUE.");
TF_BetInfo.setText(TF_BetInfo.getText() + "\nYou have changed the text to RED.");