HexView is a Java 1.4 graphical (GUI) application to display the contents of a file in hexadecimal and as plain text (7-bit ASCII). Files may be very large. Editing and searching are not supported.

CharMap is a Java 5.0 graphical (GUI) application to display Unicode characters or glyphs in text fonts, and copy those characters to the system clipboard. Its major purpose is as a visual accessory ...

This means, you have a JFrame for displaying a screen on the Linux console and even a JFileChooser to browse the directories on the Linux machine. You can set the background color using the ...