Confused about the List class

[Jagruti23]

Hello Guys,

I need your help to sort out my confusion about the List class of advanced java. In one my java project I have to use this List class. But I don't have enough knowledge about List class. If anyone posses sound knowledge about List class of java then please let me know the same. I would greatly appreciate your any help over List class of java.

[kelfro]

If an application wants to perform some action based on an item in this list being selected or activated by the user, it should implement ItemListener or ActionListener as appropriate and register the new listener to receive events from this list. For multiple-selection scrolling list class, it is considered a better user interface to use an external gesture (such as clicking on a button) to trigger the action.

[Katty]

Hi friend,

I hope something below will help you to know about the List class:

java.awt.List
import java.util.ArrayList;

public class ToArrayDM 
{
  public static void main(String[] ankrgs) {
    List list01 = new ArrayList();
    list01.add("Blobbo");
    list01.add("Cracked");
    list01.add("Dumbo");
 
    Object[] ol1 = list01.toArray();
    System.out.println("Array of Object has length " + ol1.length);
   
    String[] sl01 = (String[]) list01.toArray(new String[0]);
    System.out.println("Array of String has length " + sl01.length);
  }
}

[Praetor]

If you want to know about the methods of List class, then please go through the following:

1. getPreferredSize(int rw)
2. getListeners(Class listnrTp)
3. delItems(int st, int ld)
4. getMinimumSize(int rw)
5. setMultipleSelections(boolean bl)

[Modifier]

Please study following java code, which will solve your confusion about the List class:

java.awt.List

public class ReverseTestSample
{
  public static void main(String arbgs[])
 {
    ArrayList snl = new ArrayList();
    snl.add("Bart");
    snl.add("Hugo");
    snl.add("Lisa");
    snl.add("Marge");
    snl.add("Homer");
    snl.add("Maggie");
    snl.add("Roy");
 
   Comparator comp = Collections.reverseOrder();
    Collections.sort(snl);
    System.out.println(snl);
  }
}

[MindSpace]

Hi,

There are totally three constructors available with List class, see below:

• List(int rw, boolean multipleMd): It is used for the creation of entirely new scrolling list with given number of rows.
• List(): It is used for the creation of new scrolling list.
• List(int rw): It is used for the creation of entirely new scrolling list with specific rows.