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How to use enum values in f:selectItem(s)
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If you prefer java.util.List you can just modify getStatuses() return type to List<Status> and return Arrays.asList(Status.values());
– stakahop
Oct 4 '16 at 12:42
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Illegal pattern character 'T' when parsing a date string to java.util.Date
I have a date string and I want to parse it to normal date use the java Date API,the following is my code:
3 Answers
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Java: Get month Integer from Date
How do I get the month as an integer from a Date object ( java.util.Date )?
7 Answers
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Best way to “negate” an instanceof
...s thinking if there exists a better/nicer way to negate an instanceof in Java.
Actually, I'm doing something like:
9 Answ...
Hashset vs Treeset
...don't care to mess around with hash functions and buckets (in the case of Java ).
14 Answers
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What is a stack trace, and how can I use it to debug my application errors?
...ication. Let's have a look at the stack trace:
Exception in thread "main" java.lang.NullPointerException
at com.example.myproject.Book.getTitle(Book.java:16)
at com.example.myproject.Author.getBookTitles(Author.java:25)
at com.example.myproject.Bootstrap.main(Bootstrap.java:...
Why should I avoid multiple inheritance in C++?
... Diamond of Dread described above. In fact, this is how things are done in Java.
Usually, what you mean when C inherits from A and B is that users can use C as if it was a A, and/or as if it was a B.
In C++, an interface is an abstract class which has:
all its method declared pure virtual (suffixed...
Unsupported major.minor version 52.0 [duplicate]
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The issue is because of Java version mismatch. Referring to the Wikipedia Java Class Reference:
Java SE 14 = 58
Java SE 13 = 57
Java SE 12 = 56 (0x38 hex)
Java SE 11 = 55 (0x37 hex)
Java SE 10 = 54
Java SE 9 = 53
Java SE 8 = 52
Java SE 7 = 51
Java ...
App Inventor 2 解决一个编译报错DX failed - App Inventor 2 中文网 - 清...
...译失败，报错如下：
-----通过查看编译日志：
[java] indicate that it is *not* an inner class.
[java] Uncaught translation error: java.lang.IllegalArgumentException: already added: Lorg/eclipse/paho/client/mqttv3/BufferedMessage;
&nbs...
Convert LocalDate to LocalDateTime or java.sql.Timestamp
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JodaTime
To convert JodaTime's org.joda.time.LocalDate to java.sql.Timestamp, just do
Timestamp timestamp = new Timestamp(localDate.toDateTimeAtStartOfDay().getMillis());
To convert JodaTime's org.joda.time.LocalDateTime to java.sql.Timestamp, just do
Timestamp timestamp = new Time...