Java Swing:鼠标悬停在JComboBox项目上的文本？

JComboBox<String> comboBox = new JComboBox<>(new String[]{"Option 1", "Option 2", "Option 3"});
comboBox.setToolTipText("Select an option");

JComboBox<String> comboBox = new JComboBox<>(new String[]{"Option 1", "Option 2", "Option 3"});
DefaultListCellRenderer renderer = (DefaultListCellRenderer) comboBox.getRenderer();
renderer.setToolTipText("Select an option");