java.lang.ClassCastException是Java中的一种运行时异常,它发生在尝试将对象强制转换为不兼容的类时。例如,当你尝试将一个String对象转换为Integer对象时,由于它们之间没有继承关系,因此会抛出ClassCastException。 2. 分析为何java.util.HashSet不能被转换为java.util.List java.util.HashSet和java.util.List是Java...
java.lang.ClassCastException: java.util.HashSet cannot be cast to java.util.SortedSet0 [待解决问题] 浏览: 2509次 在使用Hibernate中的一对多关联时出现异常,异常如下: yanshuaiqi | 菜鸟二级 | 园豆:204 提问于:2013-11-22 12:53 < > 豆包AI编程 分享 所有回答(1) 0 什么类型的数据要使用有序...
ava.lang.RuntimeException: Unable to start activity ComponentInfo{SearchActivity}: java.lang.ClassCastException: java.util.HashSet cannot be cast to java.lang.String at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3254) at android.app.ActivityThread.handleLaunchActivity(ActivityThread...
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) Caused by: java.lang.ClassCastException: java.util.HashSet cannot be cast to java.lang.String at android.app.SharedPreferencesImpl.getString(SharedPreferencesImpl.java:225) at SearchActivity.readHistory(SearchActivity.java:332) at Sea...
Exception in thread "main" java.lang.ClassCastException: Bird cannot be cast to java.lang.Comparable at java.util.TreeMap.compare(Unknown Source) at java.util.TreeMap.put(Unknown Source) at java.util.TreeSet.add(Unknown Source) at com.sedion.bysocket.collection.TreeSetTest.main(TreeSetTest...
Exceptioninthread"main"java.lang.ClassCastException: Bird cannot be cast to java.lang.Comparable at java.util.TreeMap.compare(Unknown Source) at java.util.TreeMap.put(Unknown Source) at java.util.TreeSet.add(Unknown Source) at com.sedion.bysocket.collection.TreeSetTest.main(TreeSetTest.java:...
java.util.LinkedHashMap cannot be cast to com.zq.dataservice.bean.Index 上述错误是在做一个趋势投资demo时遇到的. 说的是链式HashMap不能转换为单个对象进行foreach 其解决: private List<IndexData> map2IndexData(List<Map> temp) { List<IndexData> indexDatas = new ArrayList<> ...
Exception in thread"main"java.lang.ClassCastException:classjava.lang.Stringcannotbecast to classjava.lang.Boolean(java.lang.Stringandjava.lang.Booleanare in modulejava.baseof loader'bootstrap')atjava.base/java.lang.Boolean.compareTo(Boolean.java:45)atjava.base/java.util.TreeMap.put(TreeMap.java...
:java.lang.ClassCastException:java.lang.Integercannotbecast tojava.lang.String类型转换的时候出现异常,这种情况就体现了泛型存在的必要性,对传参类型进行统一...## 突然发现这标题里面的<>貌似被限制了???一,集合添加元素 1, 普通集合List 以上代码编译时会出现警告提示:Typesafety:Themethod add ...
运行结果会报错!Exception in thread "main" java.lang.ClassCastException: day0211.F cannot be cast to java.lang.Comparable at java.util.TreeMap.put(TreeMap.java:542) at java.util.TreeSet.add(TreeSet.java:238) at day0211.TestSet5.main(TestSet5.java:12) ...