Category Archives: Java

PHP Arrays in JAVA

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Going from PHP to Java is a step backwards when dealing with arrays (imo).  One of the more beneficial things that you can do with a PHP array is define keys.  For example I can do something like:

$myList = array("oranges"=>15, "apples"=>25);

Then I can access how many oranges I have by going echo $myList["oranges"];

To do something like this in JAVA is a bit different than just defining a normal array. In JAVA you need to use a HashMap:

HashMap<String,Integer> myList = new HashMap<String,Integer>();
myList.put("oranges", 15);
myList.put("apples", 25);
If you need to store two strings, then change the object type (I.e. HashMap<String,String>).
To get the value, simply use the get method.

myList.get("oranges");

How to use Unix Timestamp with Java

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You can use a unix timestamp in java wit the following code:

import java.util.Date;
String TimeStamp = "1324716371";
Date time=new Date((long)TimeStamp*1000);

Now, timestamp doesn't have to be a string, however in many of your projects you may have the value in that format. In this case, we convert it to a long (integer is too small), and then multiply it by 1000 since Java uses milliseconds.