大约有 7,700 项符合查询结果（耗时：0.0211秒） [XML]
Instantiating object of type parameter
...odException` to be compiled. Your answer is unfortunately not friendly to Java beginner.
– purucat
Sep 12 '16 at 2:45
...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
...
I got this error using Java and PostgreSQL doing an insert on a table. I will illustrate how you can reproduce this error:
org.postgresql.util.PSQLException: ERROR:
current transaction is aborted, commands ignored until end of transaction block
...
How to serialize a lambda?
...
Java 8 introduces the possibility to cast an object to an intersection of types by adding multiple bounds. In the case of serialization, it is therefore possible to write:
Runnable r = (Runnable & Serializable)() -> S...
How to debug stream().map(…) with lambda expressions?
In our project we are migrating to java 8 and we are testing the new features of it.
6 Answers
...
What should every JavaScript programmer know? [closed]
Is there a set of things that every JavaScript programmer should know to be able to say "I know JavaScript"?
30 Answers
...
Truncate a list to a given number of elements
...
Use List.subList:
import java.util.*;
import static java.lang.Math.min;
public class T {
public static void main( String args[] ) {
List<String> items = Arrays.asList("1");
List<String> subItems = items.subList(0, min(items.siz...
Print “hello world” every X seconds
...duledExecutorService is even better, though; refer to Brian Goetz et al.'s Java Concurrency in Practice. The latter class has been around for nearly a decade—it's sad that all these other answers overlook it.
– Michael Scheper
Aug 14 '13 at 2:32
...
Why is Double.MIN_VALUE in not negative
...his. I was porting some statistical analysis code and blindly translating java to C#. I noticed some numbers coming out at -infinity or NaN and took a closer look at the algorithm. I realized that double.MIN_VALUE made no sense in context and did a search. This post comes up before the java docs...
Benefit of using Parcelable instead of serializing object
...t have triggered the question, why is Android not using the
built-in Java serialization mechanism? It turns out that the
Android team came to the conclusion
that the serialization in Java is far too slow to satisfy Android’s
interprocess-communication
requirements. So the tea...
Match multiline text using regular expression
I am trying to match a multi line text using java. When I use the Pattern class with the Pattern.MULTILINE modifier, I am able to match, but I am not able to do so with (?m).
...