How to get to know whether drop down list values are in sorted order or not - Selenium WebDriver

Drop down list values are in sorted order or not in Selenium WebDriver

import static org.junit.Assert.*;

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

import org.junit.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

public class DropDownListSortedOrNot {

@Test
public void dropDownListSortedOrNot() throws InterruptedException {
WebDriver driver = new FirefoxDriver();
driver.get("http://www.ebay.in/");
Thread.sleep(3000);
WebElement element = driver.findElement(By.id("gh-cat"));
element.click();
List<WebElement> dropDownvalues = element.findElements(By.tagName("option"));
ArrayList<String> listValues = new ArrayList<String>();
for(WebElement value : dropDownvalues) {
System.out.println("values are"+ value.getText());
listValues.add(value.getText());
}
boolean sortedOrNot = sortedOrNot(listValues);
assertEquals(true, sortedOrNot);
driver.close();

}

public boolean sortedOrNot(ArrayList<String> dropDownValues) {
System.out.println("number of values "+ dropDownValues.size());
for(int i=0; i<dropDownValues.size();i++) {
int temp = dropDownValues.get(i).compareTo(dropDownValues.get(i+1));
if(temp>1) {
System.out.println("i value"+i);
return false;
}
}
return true;
}


}