大约有 9,000 项符合查询结果（耗时：0.0216秒） [XML]
Weird Integer boxing in Java
...
This range can be extended using java.lang.Integer.IntegerCache.high property. Interesting that Long doesn't have that option.
– Aleksandr Kravets
Aug 31 '15 at 10:29
...
Java Class.cast() vs. cast operator
... evils of the C-style cast operator I was pleased at first to find that in Java 5 java.lang.Class had acquired a cast method.
...
Convert JSON to Map
...r. :-)
For such a simple mapping, most tools from http://json.org (section java) would work.
For one of them (Jackson https://github.com/FasterXML/jackson-databind/#5-minute-tutorial-streaming-parser-generator), you'd do:
Map<String,Object> result =
new ObjectMapper().readValue(JSON_SO...
What is the actual use of Class.forName(“oracle.jdbc.driver.OracleDriver”) while connecting to a dat
....driver.OracleDriver");
// and
Class<?> stringClass = Class.forName("java.lang.String");
Class.forName("com.example.some.jdbc.driver") calls show up in legacy code that uses JDBC because that is the legacy way of loading a JDBC driver.
From The Java Tutorial:
In previous versions of JDBC, to...
Java List.add() UnsupportedOperationException
...rays.asList(membersArray) is one of that. You need to insert the record in java.util.ArrayList or use the below approach to convert into ArrayList.
With the minimal change in your code, you can do below to convert a list to ArrayList. The first solution is having a minimum change in your solution, ...
how to create a Java Date object of midnight today and midnight tomorrow?
...
java.util.Calendar
// today
Calendar date = new GregorianCalendar();
// reset hour, minutes, seconds and millis
date.set(Calendar.HOUR_OF_DAY, 0);
date.set(Calendar.MINUTE, 0);
date.set(Calendar.SECOND, 0);
date.set(Cale...
Schema for a multilanguage database
I'm developing a multilanguage software. As far as the application code goes, localizability is not an issue. We can use language specific resources and have all kinds of tools that work well with them.
...
What data type to use for money in Java? [closed]
What data type should you use for money in Java?
11 Answers
11
...
How to get the first non-null value in Java?
Is there a Java equivalent of SQL's COALESCE function? That is, is there any way to return the first non-null value of several variables?
...
Failed to load the JNI shared Library (JDK)
...
You need a 64-bit trio:
64-bit OS
64-bit Java
64-bit Eclipse
share
|
improve this answer
|
follow
|
...