这样强制转换编译会提示Unchecked cast: 'java.lang.Object' to 'java.util.List<java.lang.String>'...
java.lang.RuntimeException: Cannot reconnect. at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:82) at org.jetbrains.idea.maven.server.MavenServerManager.applyProfiles(MavenServerManager.java:522) at org.jetbrains.idea.maven.project.MavenProjectReader.applyProfiles(Mav...
idea默认输入类的名字要首个字母大写才提示,小写不提示,比如要输入Object类必学写大写的O,小写的o不提示, 点击左上角的File弹框后点击Settings,打开设置界面,如下: 搜索框输入case,找到Case sensitive选择First letter,最后点击Apply应用按钮生效即可,如下: 现在,回到代码编辑器,写一个小写的o,就有跟Object类等开头...
JDK API对于RandomAccess接口的解释是:实现RandomAccess接口用来表明其支持快速随机访问,此接口的主要目的是允许一般的算法更改其行为,从而将其应用到随机或连续访问列表时能提供良好的性能。实际经验表明,实现RandomAccess接口的类实例,假如是随机访问的,使用普通for循环效率将高于使用foreach循环;反过来,如果是顺序访问的,...
官网: https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html ClassFile { u4 magic; u2 minor_version; u2 major_version; u2 constant_pool_count; cp_info constant_pool[constant_pool_count-1]; u2 access_flags; u2 this_class; u2 super_class; u2 interfaces_count; u2 interfaces[...
java.lang.RuntimeException: Cannot reconnect. at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:82) at org.jetbrains.idea.maven.server.MavenServerManager.applyProfiles(MavenServerManager.java:522) at org.jetbrains.idea.maven.project.MavenProjectReader.applyProfiles(Mav...
Caused by: java.lang.RuntimeException: Cannot reconnect. at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:111) at org.jetbrains.idea.maven.server.MavenIndexerWrapper.createIndex(MavenIndexerWrapper.java:61) ...
IDEA 全称 IntelliJ IDEA，是java语言开发的集成环境，IntelliJ在业界被公认为最好的Java开发工具之一,...
Exception in thread "main" java.lang.ClassCastException: com.alibaba.fastjson.JSONObject cannot be.. .lang.ClassCastException:com.alibaba.fastjson.JSONObject cannot be cast tocom.exa.demo2.PO.PeopleInfoPO 问题是因为:在使用String peopleJson =JSON.toJSONString(peopleInfoPO)没有加入类型信息SerializerF...
Equivalent Java source code: private final java.lang.Object $lock = new java.lang.Object[0]; private DateFormat format = new SimpleDateFormat("MM-dd-YYYY"); public String synchronizedFormat(Date date) { synchronized ($lock) { return format.format(date); } } @SneakyThrows @SneakyThrows is ...