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How do I apply the for-each loop to every character in a String?
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@Pacerier No, the current Java compilers will never optimize code.
– RAnders00
Feb 11 '16 at 20:16
1
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What is the difference between getFields and getDeclaredFields in Java reflection
...tween the getFields method and the getDeclaredFields method when using Java reflection.
4 Answers
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java.sql.SQLException: - ORA-01000: maximum open cursors exceeded
...n extremely common error in Oracle database development. In the context of Java, it happens when the application attempts to open more ResultSets than there are configured cursors on a database instance.
Common causes are:
Configuration mistake
You have more threads in your application querying...
How to view the contents of an Android APK file?
...install. It is written in perl (as opposed to APKTool, which is written in Java), and uses aapt for the actual decompilation. It also does not decompile attrib resources yet (which APKTool does).
The meaning of the name is "aapt", Android's resource compiler, shifted down one letter.
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How to get the first element of the List or Set? [duplicate]
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See the javadoc
of List
list.get(0);
or Set
set.iterator().next();
and check the size before using the above methods by invoking isEmpty()
!list_or_set.isEmpty()
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How to test code dependent on environment variables using JUnit?
I have a piece of Java code which uses an environment variable and the behaviour of the code depends on the value of this variable. I would like to test this code with different values of the environment variable. How can I do this in JUnit?
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Java: int array initializes with nonzero elements
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Determining if an Object is of primitive type
...lt into the standard libraries for this, but it's easy to code up:
import java.util.*;
public class Test
{
public static void main(String[] args)
{
System.out.println(isWrapperType(String.class));
System.out.println(isWrapperType(Integer.class));
}
private ...
Collections.emptyMap() vs new HashMap()
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From Effective Java, Item #43 - "Return empty arrays or collections, not null" demonstrates returning an empty collection and perhaps even demonstrates using these emptyList(), emptySet(), and emptyMap() methods on the Collections class to...
Swing vs JavaFx for desktop applications [closed]
...ents.
Now SWT being somewhat old I would like to switch to either Swing or JavaFX. And I would like to hear your thoughts on three things.
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