大约有 7,479 项符合查询结果（耗时：0.0246秒） [XML]
Create a string with n characters
Is there a way in java to create a string with a specified number of a specified character? In my case, I would need to create a string with 10 spaces. My current code is:
...
How to use null in switch
...
This is not possible with a switch statement in Java. Check for null before the switch:
if (i == null) {
doSomething0();
} else {
switch (i) {
case 1:
// ...
break;
}
}
You can't use arbitrary objects in switch statements*. The reason tha...
Converting JSONarray to ArrayList
... }\n" +
" }\n" +
" ]";
ContactModel.java:
public class ContactModel {
public String id;
public String name;
public String email;
}
Code for converting a JSON string to ArrayList<Model>:
Note: You have to import java.lang.reflect.Type;:...
Disable HttpClient logging
...ur exactly setup.
Commons-Logging can log to log4j, but it can also log to java.util.logging (JDK1.4 logging)
Commons-Logging tries to be smart and guess which logging framework you are already using, and send its logs to that.
If you don't already have a logging framework, and are running on a JRE ...
Creating an instance using the class name and calling constructor
...
You want to be using java.lang.reflect.Constructor.newInstance(Object...)
share
|
improve this answer
|
follow
...
Timer & TimerTask versus Thread + sleep in Java
...
From the Timer documentation:
Java 5.0 introduced the java.util.concurrent package and one of the
concurrency utilities therein is the ScheduledThreadPoolExecutor which
is a thread pool for repeatedly executing tasks at a given rate or
delay. It is ...
How do I fix "The expression of type List needs unchecked conversion…'?
In the Java snippet:
9 Answers
9
...
get string value from HashMap depending on key name
...et(myCode);
Here's a tutorial about maps, you may find it useful: http://java.sun.com/docs/books/tutorial/collections/interfaces/map.html.
Edit: you edited your question with the following:
I'm expecting to see a String, such as "ABC" or "DEF" as that is what I put in there initially, but if ...
What does -XX:MaxPermSize do?
...lly generate and load many classes; for example,
some implementations of JavaServer Pages (JSP) pages. These
applications may need a larger permanent generation to hold the
additional classes. If so, the maximum permanent generation size can
be increased with the command-line option -XX:MaxP...
How to add an image to a JPanel?
...e's how I do it (with a little more info on how to load an image):
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JPanel...