Java : Collection Framework : TreeSet (Add Object)

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TreeSetExample.java

import java.util.TreeSet;

/*
 * Example of add(E e) method.
 */
public class TreeSetExample
{
    public static void main( String[] args )
    {

        TreeSet<Integer> treeSet = new TreeSet<Integer>();

        System.out.println("treeSet : " + treeSet + "\n");

        /*
         * Adds the specified element to this set if it is not already present.
         * 
         * If this set already contains the element, the call leaves the set
         * unchanged and returns false.
         */
        boolean isAdded = treeSet.add(10);

        System.out.println("isAdded : " + isAdded);
        System.out.println("treeSet: " + treeSet + "\n");

        isAdded = treeSet.add(10);

        System.out.println("isAdded : " + isAdded);
        System.out.println("treeSet: " + treeSet + "\n");

    }
}

Output

treeSet : []

isAdded : true
treeSet: [10]

isAdded : false
treeSet: [10]

To Download TreeSetDemoAdd Project Click the below link
https://sites.google.com/site/javaee4321/java-collections/TreeSetDemoAdd.zip?attredirects=0&d=1

See also:

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