Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>i really don't know why you want to do this... but if it helps, i've created a RandomMap that automatically randomizes the values when you call values(), then the following runnable demo application might do the job... </p> <pre><code> package random; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.TreeMap; public class Main { public static void main(String[] args) { Map hashMap = makeHashMap(); // you can make any Map random by making them a RandomMap // better if you can just create the Map as a RandomMap instead of HashMap Map randomMap = new RandomMap(hashMap); // just call values() and iterate through them, they will be random Iterator iter = randomMap.values().iterator(); while (iter.hasNext()) { String value = (String) iter.next(); System.out.println(value); } } private static Map makeHashMap() { Map retVal; // HashMap is not ordered, and not exactly random (read the javadocs) retVal = new HashMap(); // TreeMap sorts your map based on Comparable of keys retVal = new TreeMap(); // RandomMap - a map that returns stuff randomly // use this, don't have to create RandomMap after function returns // retVal = new HashMap(); for (int i = 0; i &lt; 20; i++) { retVal.put("key" + i, "value" + i); } return retVal; } } /** * An implementation of Map that shuffles the Collection returned by values(). * Similar approach can be applied to its entrySet() and keySet() methods. */ class RandomMap extends HashMap { public RandomMap() { super(); } public RandomMap(Map map) { super(map); } /** * Randomize the values on every call to values() * * @return randomized Collection */ @Override public Collection values() { List randomList = new ArrayList(super.values()); Collections.shuffle(randomList); return randomList; } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POIs there a way to get the value of a HashMap randomly in Java?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USkctang
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload