The ignoring toString() method

Consider the following Apex class:

public class ToStringDemo {  
    public String companyName {get;set;} 
    public String city {get;set;}   
} 

A developer can print any important information about this class by running the following anonymous Apex code:

ToStringDemo obj = new ToStringDemo(); 
obj.companyName = 'Salesforce'; 
obj.city = 'SFO'; 
System.debug(obj); 

The output is as follows:

ToStringDemo:[city=SFO, companyName=Salesforce] 

In the preceding code, we are trying to print an object for debugging purposes. Internally, Apex calls the toString() method. As we have not overridden it, Salesforce uses its predefined className:[variable1=value,variable2=value,...] format to print the object value:

Ignoring the override of the toString() method is considered as an anti-pattern and we should implement it whenever possible.

Note

Every class in Apex is by default a child of the Object class. So, all the classes inherit...