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How to convert byte array to string and vice versa?
...are a bunch of encodings you can use, look at the Charset class in the Sun javadocs.
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Android - Set max length of logcat messages
..."....");
Implementation:
package ...;
import android.util.Log;
import java.util.Arrays;
public class Logger {
private static final String LOG_TAG = "MyRockingApp";
/** @see <a href="http://stackoverflow.com/a/8899735" /> */
private static final int ENTRY_MAX_LEN = 4000;
...
How to create our own Listener interface in android?
...
Create a new file:
MyListener.java:
public interface MyListener {
// you can define any parameter as per your requirement
public void callback(View view, String result);
}
In your activity, implement the interface:
MyActivity.java:
public cla...
Why I can't change directories using “cd”?
...round this is to use an alias instead:
alias proj="cd /home/tree/projects/java"
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Why does Hibernate require no argument constructor?
...r proper dependency injection and for rich object behaviour). Furthermore, Java reflection allows you to create objects without using newInstance(). The method getDeclaredConstructors has been in the reflection API since JDK 1.1. It's terrifying that the JPA spec designers neglected this.
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Jackson Vs. Gson [closed]
...
Jackson and Gson are the most complete Java JSON packages regarding actual data binding support; many other packages only provide primitive Map/List (or equivalent tree model) binding.
Both have complete support for generic types, as well, as enough configurabilit...
What is the difference between an interface and abstract class?
...ometimes untrue. Sometimes, they are not even what you think they are.
In Java, this rule is strongly enforced, while in PHP, interfaces are abstract classes with no method declared.
In Python, abstract classes are more a programming trick you can get from the ABC module and is actually using meta...
HashMap get/put complexity
...s to the same bucket, thus O(N) if each bucket is backed by a List.
since Java 8, HashMap dynamically replaces the Nodes (linked list) used in each bucket with TreeNodes (red-black tree when a list gets bigger than 8 elements) resulting to a worst performance of O(logN).
But, this in NOT the full...
What is the correct way to get a subarray in Scala?
...scala> Array("foo", "hoo", "goo", "ioo", "joo").slice(1, 4)
res6: Array[java.lang.String] = Array(hoo, goo, ioo)
It works like in python.
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NSLog the method name with Objective-C in iPhone
...ne number as well. I'm not sure, as I've used a great logging framework in Java (SLF4J + LogBack) but not Cocoa.
See this question for links to various Cocoa logging frameworks.
Name of Selector
If you have a Selector variable (a SEL), you can print its method name ("message") in either of two wa...