How to compare values from the list or from dropdown list in webdriver (Java)?

Question

Below is my code and html code, please let me know how to compare values. When i executed i am getting same result (Mateched) for multiple times. But i want to compare and display result as "Matched" (Only for one time).

public class Ex1 {
private WebDriver d;
@Test
public void testUntitled() throws Exception {
d = new FirefoxDriver();
d.get("http://register.rediff.com/commonreg/index.php?redr=http://portfolio.rediff.com/money/jsp/loginnew.jsp?redr=home");

String[] exp = {"Month", "JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"}; 
WebElement dropdown = d.findElement(By.id("date_mon"));  
        Select select = new Select(dropdown);  

        List<WebElement> options = select.getOptions();  
        for(WebElement we:options)  
        {  
         for (int i=0; i<exp.length; i++){
             if (we.getText().equals(exp[i])){
             System.out.println("Matched");
             } 
           }
         }  }}

Output:

Mateched
Mateched
Mateched
Mateched
Mateched
Mateched
Mateched
Mateched
Mateched
Mateched
Mateched
Mateched
Mateched 

Html:

select id="date_mon" onfocus="validateSignupForm(3)" name="date_mon">
<option value="">Month</option>
<option value="01">JAN</option>
<option value="02">FEB</option>
<option value="03">MAR</option>
<option value="04">APR</option>
<option value="05">MAY</option>
<option value="06">JUN</option>
<option value="07">JUL</option>
<option value="08">AUG</option>
<option value="09">SEP</option>
<option value="10">OCT</option>
<option value="11">NOV</option>
<option value="12">DEC</option>

Answer 1

The reason you are getting so many different matched is because you print it as you go through the loop. My personal suggestion, I like the KISS method, change the code to something like the following:

public class Ex1 {

private WebDriver d;

@Test
public void testUntitled() throws Exception {
    d = new FirefoxDriver();
    d.get("http://register.rediff.com/commonreg/index.php?redr=http://portfolio.rediff.com/money/jsp/loginnew.jsp?redr=home");

    int count = 0;
    String[] exp = {"Month", "JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"};
    WebElement dropdown = d.findElement(By.id("date_mon"));
    Select select = new Select(dropdown);

    List<WebElement> options = select.getOptions();
    for (WebElement we : options) {
        for (int i = 0; i < exp.length; i++) {
            if (we.getText().equals(exp[i])) {
                count++;
            }
        }
    }
    if (count == exp.length) {
        System.out.println("matched");
    } else {
        System.out.println("Houston, we have a problem.");
    }
}
}

This will just count the amount of matches and then if the total is the total count for the length.

What I changed on your code:

Added int count = 0;

changed System.out.println("Matched"); to count++;

added:

if (count == exp.length) {
    System.out.println("matched");
} else {
    System.out.println("Houston, we have a problem.");
}

Per the discussion in the comments, I created a function to perform this

public boolean compareElements(String a,List<WebElement> b) {
    for (WebElement we:b) {
        if (a.equalsIgnoreCase(we.getText())) {
            return true;
        }
    }
    return false;
}

Example usage:

for (String e:exp) {
    if (compareElements(e,we)) {
        //code for if it was found
    } else {
        //code if it's not found
    }
}

Answer 2

public class Ex1 {
private WebDriver d;
@Test
public void testUntitled() throws Exception {
d = new FirefoxDriver();
d.get("http://register.rediff.com/commonreg/index.php?redr=http://portfolio.rediff.com/money/jsp/loginnew.jsp?redr=home");

String[] exp = {"Month", "JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"}; 
WebElement dropdown = d.findElement(By.id("date_mon"));  
        Select select = new Select(dropdown);  

        List<WebElement> options = select.getOptions();
        loop:  
        for(WebElement we:options)  
        {  
         for (int i=0; i<exp.length; i++){
             if (we.getText().equals(exp[i])){
             System.out.println("Matched");
             break loop;
             } 
          }
        }  
      }
    }