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javaswingjoptionpanelook-and-feel

JOptionPane no button text with custom LNF

I tried styling a custom-made Dialog which allows the user to create a new folder. Until I loaded my custom Look and Feel, everything looked just fine:

Dialog without custom Look and Feel

Now I tried setting the Look and Feel and the texts of the buttons disappeared.

Dialog with custom Look and Feel

I set up an SSCCE which demonstrates this behaviour. Please note that the LNF class does nothing except for loading all values from UIManager.getDefaults(). If this helps, I'm using Debian 8 (jessie) with Gnome 3.18.1 and the global dark theme toggled on.

Why does this happen and how can I fix the disappearing of those button texts?

Solution

  • The values retrieved by UIManager.getDefaults() do not include the texts for JOptionPane buttons whose properties are OptionPane.cancelButtonText and OptionPane.okButtonText respectively. This causes the buttons to be displayed without any text, causing them to be as small as in the screenshot provided in the question. By setting OptionPane.cancelButtonText and OptionPane.okButtonText to the desired values, the JOptionPane buttons will display the set text. This solution may also apply for the yes/no buttons.