I searched through many posts and figured out that JLabel supports HTML.
So I can do
JLabel search = new JLabel(\"Search
Non-breaking spaces ( ) are supported:
new JLabel("Search
By:");
If you want to have real right-alignment, use individual right-aligned labels and combine them:
JLabel search = new JLabel("Search", SwingConstants.RIGHT);
JLabel by = new JLabel("By:", SwingConstants.RIGHT);
JPanel combined = new JPanel();
combined.setOpaque(false);
combined.setLayout(new GridLayout(2, 1));
combined.add(search);
combined.add(by);
or use a read-only JTextPane instead (with \n for line breaks):
JTextPane text = new JTextPane();
SimpleAttributeSet attributes = new SimpleAttributeSet();
StyleConstants.setAlignment(attributes, StyleConstants.ALIGN_RIGHT);
StyleConstants.setFontFamily(attributes, "Default");
text.setParagraphAttributes(attributes, true);
text.setEditable(false);
text.setOpaque(false);
text.setText("Search\nBy:");