/* 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 String getArrayAsString(String[] stringArray, String separator) {
        if(stringArray == null || stringArray.length == 0) return "";
 
        StringBuilder finalString = new StringBuilder(stringArray[0]);
 
        for(int i = 1; i < stringArray.length; ++i)
            finalString.append(separator).append(stringArray[i]);
 
        return finalString.toString();
    }
 
	public static void main (String[] args) throws java.lang.Exception
	{
		String[] arr = new String[]{"Hello", "World"};
		System.out.println(String.join(" | ", arr));
		System.out.println(getArrayAsString(arr, " | "));
	}
}

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