Question

How to copy all elements of TreeSet to an Object Array in Java

Answer 1

package javaapplication1;

import java.util.TreeSet;

public class JavaApplication1 {

    public static void main(String[] args) {

        TreeSet treeSet = new TreeSet();
        
        treeSet.add("Java");
        treeSet.add("C");
        treeSet.add("C++");
        treeSet.add("C#");
        treeSet.add("PHP");
        treeSet.add("JavaScript");
        treeSet.add("Python");
   
        Object[] oArr = treeSet.toArray();

        for (int i = 0; i < oArr.length; i++)
            System.out.println(oArr[i]);
    }
}
 
/*

run:

C
C#
C++
Java
JavaScript
PHP
Python

*/

 

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Answer 2

package javaapplication1;

import java.util.TreeSet;

public class JavaApplication1 {

    public static void main(String[] args) {

        TreeSet treeSet = new TreeSet();
        
        treeSet.add("Java");
        treeSet.add("C");
        treeSet.add("C++");
        treeSet.add("C#");
        treeSet.add("PHP");
        treeSet.add("JavaScript");
        treeSet.add("Python");
   
        Object[] oArr = treeSet.toArray();

        for (Object oArr1 : oArr) {
            System.out.println(oArr1);
        }
    }
}
 
/*

run:

C
C#
C++
Java
JavaScript
PHP
Python

*/

 

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