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TreeMap运行错误

Brose 2023-04-11 阅读 118


Exception in thread "main" java.lang.ClassCastException: Day16_TreeMap.Star cannot be cast to java.lang.Comparable

提示类型转换错误,

public static void main(String[] args) {
    TreeMap<Star, String> Tr = new TreeMap<Star,String>();
    //下句出错
    Tr.put(new Star("刘诗诗",22,"女"), "s001");

star类重写了compareTo方法,也提示类型转换报错

star类 书写有错,类型没有规范就到位

总结:低级错误


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