java Programming Glossary: comparatorSort on a string that may contain a number http://stackoverflow.com/questions/104599/sort-on-a-string-that-may-contain-a-number a string that may contain a number I need to write a Java Comparator class that compares Strings however with one twist. If the two..
How to sort a Map<Key, Value> on the values in Java? http://stackoverflow.com/questions/109383/how-to-sort-a-mapkey-value-on-the-values-in-java HashMap String Double map new HashMap String Double ValueComparator bvc new ValueComparator map TreeMap String Double sorted_map.. map new HashMap String Double ValueComparator bvc new ValueComparator map TreeMap String Double sorted_map new TreeMap String Double.. map System.out.println results sorted_map class ValueComparator implements Comparator String Map String Double base public ValueComparator..
Java: What is the difference between implementing Comparable and Comparator? [closed] http://stackoverflow.com/questions/1440134/java-what-is-the-difference-between-implementing-comparable-and-comparator What is the difference between implementing Comparable and Comparator closed I have seen both used. When would you use one over the.. share improve this question The text below comes from Comparator vs Comparable Comparable A comparable object is capable of comparing.. interface in order to be able to compare its instances. Comparator A comparator object is capable of comparing two different objects...
Sorting an ArrayList of Contacts based on name? [duplicate] http://stackoverflow.com/questions/1814095/sorting-an-arraylist-of-contacts-based-on-name overrides the natural ordering then you need to create a Comparator List Contact contacts new ArrayList Contact Fill it. Now sort.. instead of name default . Collections.sort contacts new Comparator Contact public int compare Contact one Contact other return.. .compareTo other.getAddress You can even define the Comparator s in the Contact itself so that you can reuse them instead of..
When to use Comparable and Comparator http://stackoverflow.com/questions/2266827/when-to-use-comparable-and-comparator to use Comparable and Comparator I have a list of objects I need to sort on a field say Score... giving much thought I wrote a new class that implements Comparator that does the task and it works. Now looking back at this I.. Comparable instead of creating a new class that implements Comparator. The score is the only field that the objects will be ordered..
http://stackoverflow.com/questions/2864840/treemap-sort-by-value pair.getKey pair.getValue class byValue implements Comparator Map.Entry String Integer public int compare Map.Entry String.. Map.Entry K V sortedEntries new TreeSet Map.Entry K V new Comparator Map.Entry K V @Override public int compare Map.Entry K V e1..
Java: How do I use a PriorityQueue? http://stackoverflow.com/questions/683041/java-how-do-i-use-a-priorityqueue this question Use the constructor overload which takes a Comparator super E comparator and pass in a comparator which compares in.. queue sorting by string length Test.java import java.util.Comparator import java.util.PriorityQueue public class Test public static.. public class Test public static void main String args Comparator String comparator new StringLengthComparator PriorityQueue String..
How to sort a Map<Key, Value> on the values in Java? http://stackoverflow.com/questions/109383/how-to-sort-a-mapkey-value-on-the-values-in-java and sorting that array through array sort with a custom comparator that sorts on the value associated with the key. Is there an.. Map String Double base this.base base Note this comparator imposes orderings that are inconsistent with equals. public..
How to compare two Dates without the time portion? http://stackoverflow.com/questions/1439779/how-to-compare-two-dates-without-the-time-portion it's even simpler TODO consider extracting the comparator to a field. return DateTimeComparator.getDateOnlyInstance .compare..
Java: What is the difference between implementing Comparable and Comparator? [closed] http://stackoverflow.com/questions/1440134/java-what-is-the-difference-between-implementing-comparable-and-comparator both used. When would you use one over the other java comparator comparable share improve this question The text below comes.. in order to be able to compare its instances. Comparator A comparator object is capable of comparing two different objects. The class.. its instances but some other class 䏭 instances. This comparator class must implement the java.util.Comparator interface. share..
Sorting an ArrayList of Contacts based on name? [duplicate] http://stackoverflow.com/questions/1814095/sorting-an-arraylist-of-contacts-based-on-name the top off you could consider to use a generic javabean comparator public class BeanComparator implements Comparator Object private..
When to use Comparable and Comparator http://stackoverflow.com/questions/2266827/when-to-use-comparable-and-comparator odds are every future sorting use case would require a comparator at which point the implementation of comparable may slow down..
http://stackoverflow.com/questions/2864840/treemap-sort-by-value sort by value I'm new to java i want to write an comparator to that will let me sort TreeMap by value instead of the default.. I guess what am i asking is what controls what get pass to comparator function can i get an Map.Entry pass to comparator java share.. pass to comparator function can i get an Map.Entry pass to comparator java share improve this question You can't have the TreeMap..
Best way to compare objects by multiple fields? http://stackoverflow.com/questions/369512/best-way-to-compare-objects-by-multiple-fields design oop share improve this question You can write a comparator class which compares two Person objects and you can examine.. the fields as you like. You can put in a variable in your comparator that tells it which field to compare to although it would probably..
Java: How do I use a PriorityQueue? http://stackoverflow.com/questions/683041/java-how-do-i-use-a-priorityqueue the constructor overload which takes a Comparator super E comparator and pass in a comparator which compares in the appropriate way.. which takes a Comparator super E comparator and pass in a comparator which compares in the appropriate way for your sort order. If.. to sort we can provide some sample code to implement the comparator if you're not sure. It's pretty straightforward though. As has..
http://stackoverflow.com/questions/935175/convert-string-to-code the class name of the objects you wish to compare String comparatorClassName ... something random to avoid class name conflicts.. to avoid class name conflicts String source public class comparatorClassName implements Comparable comparableClassName public.. options classes compilationUnits .call Comparator comparator Comparator Class.forName comparableClassName .newInstance After..
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