Each JTextComponent has a method named "setCaret", this method is used to set a custom caret. Implementing a absolutely custom Caret is a very hard job, but you can simply extend DefaultCaret! For instance if you want a wider caret use the following code:
myTextField.setCaret(new DefaultCaret() {
{
setBlinkRate(500); // half a second
}
@Override
protected synchronized void damage(Rectangle r) {
if (r == null) {
return;
}
// give values to x,y,width,height (inherited from java.awt.Rectangle)
x = r.x;
y = r.y;
width = 5;
height = getComponent().getHeight();
repaint(); // calls getComponent().repaint(x, y, width, height)
}
@Override
public void paint(Graphics g) {
JTextComponent comp = getComponent();
if (comp == null) {
return;
}
int dot = getDot();
Rectangle r = null;
try {
r = comp.modelToView(dot);
} catch (BadLocationException e) {
return;
}
if (r == null) {
return;
}
if (isVisible()) {
g.setColor(comp.getCaretColor());
g.fill3DRect(r.x, r.y, width, height, true);
}
}
});
Notes:
What is caret navigation?
(source wikipedia)
In computing, caret navigation is a kind of keyboard navigation where a caret (also known as "text cursor", "text insertion cursor", or "text selection cursor") is used to navigate within a text document. It is a fundamental feature for applications that deal with text, for example text editors (the most famous examples: Emacs and Vim), word processors and desktop publishing programs.
How does caret look like?
