Java 14在2020年3月17号正式发布,不久AdoptOpenJDK也跟进了。 JEP 358: Helpful NullPointerExceptions 其中对使用者比较有用的功能是JEP 358: Helpful NullPointerExceptions,即在NullPointerException的message中指明为什么产生了这个NPE。 示例代码如下(需要Java14,并配置运行时参数-XX:+ShowCodeDetailsInExceptionMessa...
4.Java 8之后的那些新特性 (四) :网络请求 Java Http Client 5.Java 8之后的那些新特性 (五) :Helpful NullPointerExceptions 啰嗦的数据类 如果你在Java的代码项目中,或多或少一定会接触这些类的概念 • DTO (data transfer object) 数据传输对象 • VO (Value Object) 值对象 • POJO (Plain Old ...
However, since Java 14 with Helpful NullPointerExceptions the message contains a more precise reason: Exception in thread "main" java.lang.NullPointerException: Cannot invoke "org.w3c.dom.Node.getChildNodes()" because the return value of "org.w3c.dom.NodeList.item(int)" is null at Main.proc...
Download the Java including the latest version 17 LTS on the Java SE Platform. These downloads can be used for any purpose, at no cost, under the Java SE binary code license.
"com.developlee.java14.helpfulnullpointerexceptions.HelpfulNullPointerException$Employee.getName()"because"employee"isnull 相反,在没有额外调试信息的情况下,JVM 只提供它在详细消息中所知道的变量: 代码语言:javascript 复制 Cannot invoke"com.developlee.java14.helpfulnullpointerexceptions.HelpfulNullPointerExcep...
at com.rg.java17.HelpfulNullPointerExceptions.main(HelpfulNullPointerExceptions.java:13) 3更多改进 紧凑数字格式支持 NumberFormat类中添加了一个工厂方法,以便根据Unicode标准以紧凑、人类可读的形式格式化数字。有SHORT和LONG格式可用,示例如下: NumberFormat shortFormat = NumberFormat.getCompactNumberInstance(Locale...
and debugging easier and faster, not harder and slower. In that vein, Guice steers clear of surprises and magic. You should be able to understand code with or without tools, though tools can make things even easier. When errors do occur, Guice goes the extra mile to generate helpful ...
{"role": "system", "content": "You are a helpful assistant."}, {"role": "user", "content": "Who won the world series in 2020?"}, {"role": "assistant", "content": "The Los Angeles Dodgers won the World Series in 2020."}, ...
publicclassHelpfulNullPointerException { publicstaticvoidmain(String[] args) { Employee e =null; System.out.println(e.getName()); } } classEmployee { Long id; String name; publicLong getId() { returnid; } publicvoidsetId(Long id) { ...
Banner Ads: Banner Ads Banner ads are rectangular images displayed at the top, middle, or bottom of the……