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Find first element by predicate
I've just started playing with Java 8 lambdas and I'm trying to implement some of the things that I'm used to in functional languages.
...
Why JSF saves the state of UI components on server?
...wing context param in web.xml:
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
It will then be serialized to an encrypted string in a hidden input field with the name javax.faces....
Jelly Bean DatePickerDialog — is there a way to cancel?
... Issue 34833.
I've found that the problem is possibly in DatePickerDialog.java. Where it reads:
private void tryNotifyDateSet() {
if (mCallBack != null) {
mDatePicker.clearFocus();
mCallBack.onDateSet(mDatePicker, mDatePicker.getYear(),
mDatePicker.getMonth(), m...
When exactly is it leak safe to use (anonymous) inner classes?
...Classes: Introduction
As I'm not sure how comfortable you are with OOP in Java, this will hit a couple of basics. A nested class is when a class definition is contained within another class. There are basically two types: Static Nested Classes and Inner Classes. The real difference between these ar...
How can I list ALL grants a user received?
... 22, 'LIBRARY', 23, 'DIRECTORY', 24, 'QUEUE',
28, 'JAVA SOURCE', 29, 'JAVA CLASS', 30, 'JAVA RESOURCE',
32, 'INDEXTYPE', 33, 'OPERATOR',
34, 'TABLE SUBPARTITION', 35, 'INDEX SUBPARTITION',
40, 'LOB PARTITION...
How to generate a random alpha-numeric string?
I've been looking for a simple Java algorithm to generate a pseudo-random alpha-numeric string. In my situation it would be used as a unique session/key identifier that would "likely" be unique over 500K+ generation (my needs don't really require anything much more sophisticated).
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Sorting arraylist in alphabetical order (case insensitive)
... return s1.compareToIgnoreCase(s2);
}
});
Or if you are using Java 8:
list.sort(String::compareToIgnoreCase);
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Why not abstract fields?
Why can't Java classes have abstract fields like they can have abstract methods?
5 Answers
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How to add new elements to an array?
...st<String>. It's dynamically growable, unlike arrays (see: Effective Java 2nd Edition, Item 25: Prefer lists to arrays).
import java.util.*;
//....
List<String> list = new ArrayList<String>();
list.add("1");
list.add("2");
list.add("3");
System.out.println(list); // prints "[1, 2...
Android, How can I Convert String to Date?
...
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MyClass
{
public static void main(String args[])
{
SimpleDateFormat formatter = new SimpleD...