You can use this : if(String.isBlank(record.txt_Field__c)){ Boolean isBlank = true;  } The above is same as : if (record.txt_Field__c == null || record.txt_Field__c == '' || record.txt_Field__c.trim.length() == 0) { Boolean isBlank = true;  } 

You can use this:

if(String.isBlank(record.txt_Field__c)){ Boolean isBlank = true; } 

The above is same as:

if(record.txt_Field__c == null || record.txt_Field__c == '' || record.txt_Field__c.trim.length() == 0) { Boolean isBlank = true; } 

if (record.txt_Field__c == null || record.txt_Field__c == '' || record.txt_Field__c.trim.length() == 0) { Boolean isBlank = true; } 

You can use this : if(String.isBlank(record.txt_Field__c)){ Boolean isBlank = true; } The above is same as : if (record.txt_Field__c == null || record.txt_Field__c == '' || record.txt_Field__c.trim.length() == 0) {  Boolean isBlank = true;  }