写程序,用到了 Boolean.parseBoolean 方法,将其误解。原因:误以为 Boolean.parseBoolean("true")==true,Boolean.parseBoolean("false")==false,Boolean.parseBoolean("other") Exception。In fact,Boolean.parseBoolean("true")==true,Boolean.parseBoolean("other(include false and "" and null))==false。牢记牢记呀!