大约有 7,540 项符合查询结果（耗时：0.0225秒） [XML]
Mutable vs immutable objects
...ich makes this a tenable opinion (C/C++ makes this very difficult, as does Java). In short: the advantages depend somewhat on your problem, but I would tend to prefer immutability.
share
|
improve ...
Which Eclipse version should I use for an Android app?
...
I literally did this 1 hour ago.
SDK R7
Get Java - if you don't have (its the first image link JDK)
Get Eclipse - it's the first on the list with the most downloads
Android Plugin
Download the appropriate files for your OS. The Android SDK needs java in order to inst...
What is the purpose of python's inner classes?
...ed quotation from someone else's answer about a different language (namely Java). Downvoted and I hope others do the same.
– Kevin
Feb 12 '16 at 4:20
5
...
What is the difference between up-casting and down-casting with respect to class variable
...use
Downcasting(or narrowing), and Downcasting is not directly possible in Java, explicitly we have to do.
Dog d = new Dog();
Animal a = (Animal) d; //Explicitly you have done upcasting. Actually no need, we can directly type cast like Animal a = d; compiler now treat Dog as Animal but still it i...
How can prepared statements protect from SQL injection attacks?
...uding the information about Aaron which was supposed to be hidden.
import java.sql.*;
public class Inject {
public static void main(String[] args) throws SQLException {
String url = "jdbc:postgresql://localhost/postgres?user=user&password=pwd";
Connection conn = DriverMan...
Jackson - Deserialize using generic class
...;>(){} ... But I am getting the following error - cannot access private java.lang.class.Class() from java.lang.class. Failed to set access. Cannot make a java.lang.Class constructor accessible
– gnjago
Jul 26 '12 at 19:46
...
How to start jenkins on different port rather than 8080 using command prompt in Windows?
...
Use the following command at command prompt:
java -jar jenkins.war --httpPort=9090
If you want to use https use the following command:
java -jar jenkins.war --httpsPort=9090
Details are here
...
How to compare objects by multiple fields
...
With Java 8:
Comparator.comparing((Person p)->p.firstName)
.thenComparing(p->p.lastName)
.thenComparingInt(p->p.age);
If you have accessor methods:
Comparator.comparing(Person::getFirstName)
...
Replace String in all files in Eclipse
...fill the search box
In the “File name patterns” input box, type in “.java” for replacing all Java files or type in "" to replace in all files
Click “Replace…”
Ctrl+V (Paste). Or type in the value you want to do the replacing
Enter
You can find more details in my blog post: http://bl...
Remove elements from collection while iterating
... new elements during iteration.
Using JDK >= 8
For those working with Java 8 or superior versions, there are a couple of other techniques you could use to take advantage of it.
You could use the new removeIf method in the Collection base class:
ISBN other = new ISBN("0-201-63361-2");
books.re...