contain « Set « Java Collection Q&A

1. Overriding HashSet's Contains Method    stackoverflow.com

Could anybody tell me how I can override HashSet's contains() method to use a regex match instead of just equals()? Or if not overriding, how I can add a method to use ...

2. Treeset.contains() problem    stackoverflow.com

So I've been struggling with a problem for a while now, figured I might as well ask for help here. I'm adding Ticket objects to a TreeSet, Ticket implements Comparable and has ...

3. Java TreeSet contains() gives false results    stackoverflow.com

I am trying to code a little bit of math with java. What I am trying to do, is to put cyclotomic cosets to the TreeSet. A coset has an index ...

4. HashSet contains problem with custom objects    stackoverflow.com

My Custom class that will be contained by HashSet

public class Person {
    String name;
    int age;

    public Person(String name, int age) {
 ...

5. HashSet contains method, strange behavior    stackoverflow.com

here is my code :

public class testGui {



    public static void main(String[] arg){
        class TESTS{
      ...

6. contains() method in java.util.HashSet doesn't behave as i expected from it    stackoverflow.com

This is the java main() method:

    public static void main(String[] args) {

        HashSet set = new HashSet();
     ...

7. TreeSet contains method doesn't work for me    stackoverflow.com

I want to put the custom's data into a TreeSet. When the custom number is same, I add the volume of trade. Here is my TradeNode class that implements the Comparable Interator. ...

8. Understating contains method of Java HashSet    stackoverflow.com

Newbie question about java HashSet

Set<User> s = new HashSet<User>();
User u = new User();
u.setName("name1");
s.add(u);
u.setName("name3");
System.out.println(s.contains(u));

9. Usage of HashSet.contains()    stackoverflow.com

I have a class with 3 attributes. One of the attributes is used as a unique key , so I use that one key in my equals and hashcode method. Now once ...

10. TreeSet contains "something like this"    coderanch.com

I have the following code: if (kFields.contains(field)) { doc.add(Field.UnStored("contentKeywords", value)); } if (cFields.contains(field)) { doc.add(Field.UnStored("contentContents", value)); } Basically if kFields, cFields contain field I enter the if condition. My boss wants me to add a regular expression to kField. Example: kField would contain among other things: TEXT* The desired effect is in the if statement above, if field contains TEXT1, TEXT2...TEXT ...

11. HashSet contains() method fail ?    coderanch.com

Doesn't matter. if the control enters the 'if block', I return from the program. Else I execute the print statement followed by adding the Object to the Collection. Before I explain my problem, a little of background stuff. This server appln. was deployed as a Web Service. Each time, client made a call to the method, the Collection was getting initialized ...

12. TreeSet contains() method uses copareTo() ?    forums.oracle.com

Hi, We have a TreeSet implementation in one of our application. The objects put into this TreeSet have their equals() method implemented. Also, the objects implement Comparable and have compareTo() method implemented - as we need sorting based on a specific criteria. However, the criteria used for comparision in equals() and compareTo() methods are different. The problem is - we are ...

13. HashSet contains() method    forums.oracle.com

14. Using HashSet and contains method    forums.oracle.com

15. Question on TreeSet contains(...) method    forums.oracle.com

Hey guys, The contains method returns true even if I do not override equals(Object o), which is kinda contradictory to what API says about this method. It seems that it returns true as long as I have a meaningful compareTo overridden. For example: class Dog implements Comparable { String name; public Dog(String n) { name = n; } public int compareTo(Dog ...