Save error: Method does not exist or incorrect signature: void includes(String) from the type String

Question

I've been receiving this error and need some help resolving it.

for(LP_TFL__c tfl : termForLoanList0)
{

    for(ScorecardTier scorecardTier : scorecardTierList0)
    {

      //Compare Tiers String on Term Object to Scorecard Tier Name and Match 
      //Credit Line Values Accordingly 


       *if(tfl.Tiers__c.includes(scorecardTier.tierName))
       {
            ScorecardTier.creditLine = tfl.Credit_Line_Max_Amt__c;
            ScorecardTier.promoDays = tfl.Promotional_Period__c;
            ScorecardTier.apr = tfl.Interest_Rate__c;
       }

     }
}

Save error: Method does not exist or incorrect signature: void includes(String) from the type String

The loop is supposed to compare all tiers in termForLoans and add the matching attributes to scorecardTier object when it finds a match in the list.

Answer 1

The right function to use here is contains().

From the documentation:

contains(substring)

Returns true if and only if the String that called the method contains the specified sequence of characters in substring.

Signature

public Boolean contains(String substring)

Parameters substring

Type: String

Return Value Type: Boolean

Example

String myString1 = 'abcde';
String myString2 = 'abcd';
Boolean result = myString1.contains(myString2);

System.assertEquals(result, true);