int n = JOptionPane.showConfirmDialog(null, "确认删除吗?", "确认对话框", JOptionPane.YES_NO_OPTION);
if (n == JOptionPane.YES_OPTION) {
JOptionPane.showMessageDialog(new JFrame(),"已删除");
} else if (n == JOptionPane.NO_OPTION) {
JOptionPane.showMessageDialog(new JFrame(),"已取消");
}
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