JLabel label = new JLabel("<HTML><U>YOUR TEXT HERE</U></HTML>");
label.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
OR
JLabel label = new JLabel("Underlined Label");
Font font = label.getFont();
Map attributes = font.getAttributes();
attributes.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON);
label.setFont(font.deriveFont(attributes));
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…