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Does functional programming replace GoF design patterns?
...a huge number of articles which insist that design patterns (especially in Java) are workarounds for the missing features in imperative languages. One article I found makes a fairly strong claim :
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Can JSON start with “[”?
...re i is an index from 0 through the returned JSONArray's size()-1.
import java.io.IOException;
import com.ibm.json.java.JSONArray;
import com.ibm.json.java.JSONObject;
public class BookListTest {
public static void main(String[] args) {
String jsonBookList = "{\"book_list\":{\"book\":[{\"...
How to draw a path on a map using kml file?
...on I will be parsing.
package com.myapp.android.model.navigation;
import java.util.ArrayList;
import java.util.Iterator;
public class NavigationDataSet {
private ArrayList<Placemark> placemarks = new ArrayList<Placemark>();
private Placemark currentPlacemark;
private Placemark rout...
Send an Array with an HTTP Get
...ally, when the target server uses a strong typed programming language like Java (Servlet), then you can just send them as multiple parameters with the same name. The API usually offers a dedicated method to obtain multiple parameter values as an array.
foo=value1&foo=value2&foo=value3
S...
Best way to handle list.index(might-not-exist) in python?
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This issue is one of language philosophy. In Java for example there has always been a tradition that exceptions should really only be used in "exceptional circumstances" that is when errors have happened, rather than for flow control. In the beginning this was for perfo...
How to loop through a HashMap in JSP?
...
Just the same way as you would do in normal Java code.
for (Map.Entry<String, String> entry : countries.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
// ...
}
However, scriptlets (raw Java code in JSP files, those <%...
How do I add a Maven dependency in Eclipse?
...ith the latest version of Eclipse and m2e you can right click on a regular Java project and enable Dependency Management for it. This will generate a pom.xml for the project, while leaving its structure intact.
– Perception
Feb 8 '12 at 5:40
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com.jcraft.jsch.JSchException: UnknownHostKey
I'm trying to use Jsch to establish an SSH connection in Java. My code produces the following exception:
12 Answers
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Finding the Eclipse Version Number
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eclipse.buildId=4.4.1.M20140925-0400
Again easier to find, as those are Java properties set and found with System.getProperty("eclipse.buildId").
Original answer (April 2009)
For Eclipse Helios 3.6, you can deduce the Eclipse Platform version directly from the About screen:
It is a combinatio...
@Basic(optional = false) vs @Column(nullable = false) in JPA
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@Xie Jilei: From book: Java persistence with hibernate 2007, p. 179: @Basic(optional = false) @Column(nullable = false) The @Basic annotation marks the property as not optional on the Java object level. The second setting, nullable = false on the...