大约有 1,633 项符合查询结果（耗时：0.0270秒） [XML]
java.lang.IllegalArgumentException: View not attached to window manager
...ly via AsyncTask.cancel()) closing it via .cancel().
Got the same "java.lang.IllegalArgumentException: View not attached to window manager" error when I was killing the dialog in the onCancelled() method of the AsyncTask (I'd seen this done in the excellent Shelves app).
The workaround was to ...
StringUtils.isBlank() vs String.isEmpty()
...") = false
StringUtils.isEmpty(" bob ") = false
Warning: In java.lang.String.isBlank() and java.lang.String.isEmpty() work the same except they don't return true for null.
java.lang.String.isBlank() (since Java 11)
java.lang.String.isEmpty()
...
How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version
...
java.lang.UnsupportedClassVersionError happens because of a higher JDK during compile time and lower JDK during runtime.
share
|
...
Java Serializable Object to Byte Array
...
The best way to do it is to use SerializationUtils from Apache Commons Lang.
To serialize:
byte[] data = SerializationUtils.serialize(yourObject);
To deserialize:
YourObject yourObject = SerializationUtils.deserialize(data)
As mentioned, this requires Commons Lang library. It can b...
Catching java.lang.OutOfMemoryError?
Documentation for java.lang.Error says:
14 Answers
14
...
Is it expensive to use try-catch blocks even if an exception is never thrown?
...Generally speaking, I recommend not to worry about the performance cost of language constructs until you have evidence of an actual performance problem in your code. Or as Donald Knuth put it: "premature optimization is the root of all evil".
...
Null check in an enhanced for loop
...
Use ArrayUtils.nullToEmpty from the commons-lang library for Arrays
for( Object o : ArrayUtils.nullToEmpty(list) ) {
// do whatever
}
This functionality exists in the commons-lang library, which is included in most Java projects.
// ArrayUtils.nullToEmpty sourc...
Getting java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory exception
i am executing simple Dependency Injection program of spring & getting this exception.
I have already included common-logging1.1.1.jar and spring.jar file. Could you please help to out?
...
Why is the clone() method protected in java.lang.Object?
...hat is the specific reason that clone() is defined as protected in java.lang.Object ?
11 Answers
...
What is the standard exception to throw in Java for not supported/implemented operations?
...
java.lang.UnsupportedOperationException
Thrown to indicate that the requested operation is not supported.
share
|
improve t...