Previous lesson: 14.2 How to use JFrame to provide a desktop window
JLabel
The JLabel class will show a read-only piece of text:
If you run the frame, you should see the following:
By default, the text is left aligned, but you can optionally supply a second argument to the constructor to specify right or centre alignment:
If you need to change the text that appears on the label you can invoke the setText() method:
There is also a getText() method which returns the text to be displayed as a String.
If you want to show the label using a different font you can instantiate and assign a suitable Font object:
The Font constructor accepts three argument values:
- The name of the font you require
- Whether the font should be plain, bold or italic (using the constants
Font.PLAIN,Font.BOLDorFont.ITALICrespectively. If you want your font to be both bold and italic, you can separate the constants with a vertical bar, i.e.,Font.BOLD|Font.ITALIC - The point size of the font
If you want the text to be shown in a particular colour you can assign a suitable Color object either through one of its colour constants or a colour combination you specify:
If you use the red, green, blue combination constructor then each value must be between 0 and 255 to indicate the amount of that colour that should be used. This allows you to obtain fine degrees of shading.