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Spring MVC: Complex object as GET @RequestParam
...ror for request mentioned in answer:
"Failed to convert value of type 'java.lang.String[]' to required type
'java.lang.Long[]'; nested exception is
java.lang.NumberFormatException: For input string: \"353,234\""
The data class will work only for the following request params form:
http://l...
Synthetic Class in Java
What is a synthetic class in Java? Why should it be used? How can I use it?
13 Answers
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slf4j: how to log formatted message, object array, exception
...ew Exception("something went wrong")});
will yield
one two three: a b c
java.lang.Exception: something went wrong
at Example.main(Example.java:13)
at java.lang.reflect.Method.invoke(Method.java:597)
at ...
The exact output will depend on the underlying framework (e.g. logback, log4j...
Java: Static Class?
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According to the great book "Effective Java":
Item 4: Enforce noninstantiability with a private constructor
- Attempting to enforce noninstantiability by making a class abstract does not work.
- A default constructor is generated only if a class contains no exp...
Convert timestamp in milliseconds to string formatted time in Java
... to import SimpleDateFormat, use the import as follows: import java.text.*;
– Naveen Kumar R B
Jan 4 '17 at 11:06
1
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Is there a way to instantiate a class by name in Java?
...ow to instantiate a class when having its name. Is there a way to do it in Java? I will have the package name and class name and I need to be able to create an object having that particular name.
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Use of “instanceof” in Java [duplicate]
I learned that Java has the instanceof operator. Can you elaborate where it is used and what are its advantages?
4 Answer...
Android Studio - Ambiguous method call getClass()
...ac). This will navigate to a path such as $ANDROID_HOME/sources/android-20/java/lang/Object.java. Now, within IntelliJ or Android Studio:
Make Object.java writable by choosing File -> Make File Writable. You may be prompted to do this automatically if you try to edit the file.
Remove the unboun...
How many spaces will Java String.trim() remove?
In Java, I have a String like this:
17 Answers
17
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Java, Simplified check if int array contains int
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Here is Java 8 solution
public static boolean contains(final int[] arr, final int key) {
return Arrays.stream(arr).anyMatch(i -> i == key);
}
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