#How does toString method help when we don't override it

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dusk tree
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Hello, I know when we talk about toString method, it is automatically called when we try to print an object. I also know that if we don't override it, we get a mixture of the class name and a hashcode as input.

So to have a "human readable" thing, we just override the method to the format we want.
What I wanted to know is, is it okay to override the toString method or it's better to declare another method for the printing?

I read that toString method can be used for debugging. Can someone elaborate on that pls, how does this help? This assume we don't override it?

obtuse rapidsBOT
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<@&987246399047479336> please have a look, thanks.

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TJ-Bot
Hello, I know when we talk about `toString` method, it is automatically called when we try to print an object. I also know that if we don't override it, we get a mixture of the class name and a hashcode as input. So to have a "human readable" thing, we ju

When you don’t override the toString() method in Java, the default implementation from the Object class is used. This default toString() returns a string that looks like:

getClass().getName() + '@' + Integer.toHexString(hashCode())

This means you get the class name followed by the "@" symbol and the hexadecimal representation of the object’s hash code.

How does this help?

  • It uniquely identifies the instance during debugging or logging without exposing its internal state.
  • It prevents null references or other errors when printing objects because calling toString() is safe for any object.
  • It gives a quick way to check an object’s class and confirm you are working with the intended object (especially useful in collections or logs).

However, because it doesn’t show meaningful data about the object’s fields, overriding toString() is recommended for better readability.

Useful links:

- AI generated response using gpt-4.1-mini model
steep comet
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override it

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dont create alternatives

dusk tree
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Noted

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I also read it's used in debugging, to you have an idea where exactly pls

steep comet
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it shows u for example all contents oof all variables at any time during the program execution

dusk tree
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yep, I have some knowledge of how to use one

steep comet
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then uve seen that it shows u the contents of variables

dusk tree
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yeah

steep comet
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and part of that is the toString representation

dusk tree
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yeah I see, the thing though is, if we override the toString method, don't we lose that info at some point? or doesn't matter?

steep comet
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that said, when people say "it can be useful for debugging" what they typically mean is foor example u writing some Graph algoorithm and wanting to see if it works or not, then u woould want to pop some quick System.out.println("Befoore: " + graph) and "After: " in ur code just to give it a quick test and inspect the results

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so having a toString representation forr ur graph would be useful

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in that case

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to inspect whats going on

steep comet
dusk tree
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like, normally, it prints the class name and a hashcode, if we override it to print some other contents

steep comet
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that said, all that info is still accessible to people

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person.hashCode()

dusk tree
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yeah I see, it's clearer now, thanks !