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Display the current time and date in an Android application
...e current date & time into a TextView.
String currentDateTimeString = java.text.DateFormat.getDateTimeInstance().format(new Date());
// textView is the TextView view that should display it
textView.setText(currentDateTimeString);
There is more to read in the documentation that can easily be ...
Why start an ArrayList with an initial capacity?
... post on the topic 2 months ago. The article is for C#'s List<T> but Java's ArrayList has a very similar implementation. Since ArrayList is implemented using a dynamic array, it increases in size on demand. So the reason for the capacity constructor is for optimisation purposes.
When one of t...
Finding all objects that have a given property inside a collection [duplicate]
...g memory reference locations, refer to: stackoverflow.com/questions/767372/java-string-equals-versus
– user785262
Jun 1 '12 at 20:14
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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...ed in the presence of mutable data. This is why generics are invariant in Java. Brief example of unsoundness using Java arrays (which are erroneously covariant):
Object[] arr = new Integer[1];
arr[0] = "Hello, there!";
We just assigned a value of type String to an array of type Integer[]. For ...
Disable IntelliJ Starred (Package) Imports?
...
In IDEA 14+ the sequence is:
Settings > Editor > Code Style > Java > Imports > Class count to use import with '*'
In older version of IDEA:
Settings -> Java -> Code Style -> Imports -> Class count to use import with '*'
The feature can not be disabled. You need to s...
java.lang.IllegalStateException: The specified child already has a parent
I am using fragments, when I instantiate a fragment the first time it it. but the second time I got this exception. I couldn't find the line where I got the error?
...
How to get the insert ID in JDBC?
...ord in a database (which is Microsoft SQL Server in my case) using JDBC in Java. At the same time, I want to obtain the insert ID. How can I achieve this using JDBC API?
...
Using two values for one switch case statement
... SwitchFallThrough {
public static void main(String[] args) {
java.util.ArrayList<String> futureMonths =
new java.util.ArrayList<String>();
int month = 8;
switch (month) {
case 1: futureMonths.add("January");
case 2: fu...
Why no generics in Go?
...primitive) object. So it's very similar to a container holding Objects in Java.
– poolie
Jul 30 '12 at 7:55
4
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Why should Java ThreadLocal variables be static
I was reading the JavaDoc for Threadlocal here
7 Answers
7
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