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make arrayList.toArray() return more specific types
...yList<String>();
String[] a = list.toArray(new String[0]);
Before Java6 it was recommended to write:
String[] a = list.toArray(new String[list.size()]);
because the internal implementation would realloc a properly sized array anyway so you were better doing it upfront. Since Java6 the em...
How to use Class in Java?
...
All we know is "All instances of a any class shares the same java.lang.Class object of that type of class"
e.g)
Student a = new Student();
Student b = new Student();
Then a.getClass() == b.getClass() is true.
Now assume
Teacher t = new Teacher();
without generics the below is...
Get context of test project in Android junit test case
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I get java.lang.NoSuchMethodException: android.test.ServiceTestCase.getTestContext()
– kurdtpage
May 23 '18 at 4:28
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How do I mock an autowired @Value field in Spring with Mockito?
... @MichałStochmal , doing that will produce since filed is private java.lang.IllegalStateException: Could not access method: Class org.springframework.util.ReflectionUtils can not access a member of class com.kaleidofin.app.service.impl.CVLKRAProvider with modifiers "" at org.springframewo...
Difference between string object and string literal [duplicate]
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@broofa: In what way can this be useful in JavaScript?
– Randomblue
Dec 20 '11 at 0:35
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How can I include raw JSON in an object using Jackson?
I am trying to include raw JSON inside a Java object when the object is (de)serialized using Jackson. In order to test this functionality, I wrote the following test:
...
Best way to create enum of strings?
... Strings(final String text) {
this.text = text;
}
/* (non-Javadoc)
* @see java.lang.Enum#toString()
*/
@Override
public String toString() {
return text;
}
}
Alternatively, you can create a getter method for text.
You can now do Strings.STRING_ONE.toS...
Strange out of memory issue while loading an image to a Bitmap object
...rs some great information for understanding and dealing with the exception java.lang.OutOfMemoryError: bitmap size exceeds VM budget when loading Bitmaps.
Read Bitmap Dimensions and Type
The BitmapFactory class provides several decoding methods (decodeByteArray(), decodeFile(), decodeResource(),...
Should a “static final Logger” be declared in UPPER-CASE?
In Java, static final variables are constants and the convention is that they should be in upper-case. However, I have seen that most people declare loggers in lower-case which comes up as a violation in PMD .
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Differences in boolean operators: & vs && and | vs ||
...); // 6
Thanks to Carlos for pointing out the appropriate section in the Java Language Spec (15.22.1, 15.22.2) regarding the different behaviors of the operator based on its inputs.
Indeed when both inputs are boolean, the operators are considered the Boolean Logical Operators and behave similar...