java 在java中动态更改TitledBorder颜色
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change TitledBorder color dynamically in java
提问by sajad
I have created a TitledBorder and set it to a JPanel.
我创建了一个 TitledBorder 并将其设置为 JPanel。
JPanel panel = new JPanel();
panel.setBorder(javax.swing.BorderFactory.
createTitledBorder(null, "title", javax.swing.border.
TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.
TitledBorder.DEFAULT_POSITION, null, java.awt.Color.red));
now I want to change the color of the title text of the border; and if possible border lines. I see when I change color of the border by the method titledborder.setTitleColor(theColor);and revalidate()and repaint(); the panel on form is not affected. I also created new instance of thiledBorderand assign it to the panel; but not effective. Is it necessary to renew the panel, and then set it new a border instance? thank you
现在我想更改边框标题文本的颜色；如果可能的话，边界线。当我通过方法titledborder.setTitleColor(theColor);和revalidate()和改变边框的颜色时，我看到了repaint()；表格面板不受影响。我还创建了新实例thiledBorder并将其分配给面板；但没有效果。是否有必要更新面板，然后将其设置为新的边框实例？谢谢
回答by Reimeus
You don't state how titledborderis assigned but this is how it would work:
您没有说明如何titledborder分配，但这就是它的工作方式：
TitledBorder titledBorder = BorderFactory.createTitledBorder(...);
panel.setBorder(titledBorder);
then at runtime:
然后在运行时：
titledBorder.setTitleColor(theColor);
repaint(); // revalidate not necessry
回答by Dave Marsh
If you know your panel has a titled border you can just do this:
如果你知道你的面板有一个标题边框，你可以这样做：
TitledBorder titledBorder = (TitledBorder)jPanel1.getBorder();
titledBorder.setTitleColor(Color.red);
