Question

java 怎样设置Border标题的字体大小

panel.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createLineBorder(Color.BLACK,2),
"用户录",TitledBorder.CENTER,TitledBorder.TOP));
我想把“用户登录”这个标题字体加大 可是不知道怎么实现

Answer 1

createTitledBorder(Border border, String title, int titleJustification, int titlePosition, Font titleFont)
向现有边框添加一个标题，使其具有指定的位置和默认的文本颜色（由当前外观确定）。

直接在后面再加个字体
panel.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createLineBorder(Color.BLACK,2),
"用户录",TitledBorder.CENTER,TitledBorder.TOP,new java.awt.Font("宋体",0,26)));
//宋体，普通，26号字，把中间的0改成1就是加粗

Answer 2

TitledBorder    类的文档讲了：

If the border, font, or color property values are not
specified in the constuctor or by invoking the appropriate
set methods, the property values will be defined by the current
look and feel, using the following property names in the
Defaults Table:

"TitledBorder.border"

"TitledBorder.font"

"TitledBorder.titleColor"

UIDefaults defaults=UIManager.getLookAndFeelDefaults();
String key = "TitledBorder.font";
Font font = defaults.getFont(key).deriveFont(18.0f);
UIManager.put(key,new javax.swing.plaf.FontUIResource(font));