/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int[] elements = { 1, 4, 9, 7, 3, 2, 5, 11, 0, 9 };
        for (int i = 0; i < 5; i++ )
        {
            int saved = elements[i+5];
            elements[i+5] = elements[i];
            elements[i] = saved;
        }
 
 
        // TODO: Swap the first and second half
 
        // Print all elements
        System.out.println(Arrays.toString(elements));
	}
}

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