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Why would iterating over a List be faster than indexing through it?
Reading the Java documentation for the ADT List it says:
5 Answers
5
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Scala: Abstract types vs generics
...o notions of abstraction:
parameterization and
abstract members.
In Java you also have both, but it depends on what you are abstracting over.
In Java you have abstract methods, but you can't pass a method as a parameter.
You don't have abstract fields, but you can pass a value as a parameter....
Remove file from SVN repository without deleting local copy
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When you want to remove one xxx.java file from SVN:
Go to workspace path where the file is located.
Delete that file from the folder (xxx.java)
Right click and commit, then a window will open.
Select the file you deleted (xxx.java) from the folder, and a...
What is the difference between min SDK version/target SDK version vs. compile SDK version?
... when using compileVersion 26 for example, I accidentally use a feature or java API that is not supported on version 21, which is min sdk? sorry, not really getting some fundamental concepts here
– haart
Jan 17 at 10:53
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Good example of livelock?
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Here's a very simple Java example of livelock where a husband and wife are trying to eat soup, but only have one spoon between them. Each spouse is too polite, and will pass the spoon if the other has not yet eaten.
public class Livelock {
s...
Test if object implements interface
... work in a NullPointerException safe way. For example:
if ("" instanceof java.io.Serializable) {
// it's true
}
yields true. Since:
if (null instanceof AnyType) {
// never reached
}
yields false, the instanceof operator is null safe (the code you posted isn't).
instanceof is th...
How do I create a datetime in Python from milliseconds?
I can create a similar Date object in Java by java.util.Date(milliseconds) . How do I create the comparable in Python?
5 A...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...h, it appears that the questioner did not understand an underlying fact in Java: When using "==" to compare two objects, you are testing if they are references to the same object. When using "equals()", you are testing if they have the same value. You cannot use "equals" to compare primitives.
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Fetch first element which matches criteria
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@iammrmehul No. findFirst() returns an Optional object (JavaDoc), which might be empty. In this case the call to get() will throw the NPE. To prevent that from happening, use orElse() instead of get() and provide a fallback object (like orElse(new Station("dummy", -1)), or store t...
How do I find out if first character of a string is a number?
In Java is there a way to find out if first character of a string is a number?
5 Answers
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