can this be called mutable?

[Tianpeng Xia]

class StringMethod{
     public static void main(String[]args){
       String aString="hello.world!";
       String bString=aString;
       System.out.println(bString==aString);
       aString.replace('l','o');
       
       System.out.println(bString==aString);
     }
}

Above is my code. i just want to see if String is relally immutable. if the aString is immutable, how can i change the valuel of it ? by the way, the two outputs are both true.
MUCH THANKS

[Tianpeng Xia]

I reconize where the point is !!

the replace method didn't change the real value inside aString, it just appeared like that... when i added a new line " System.out.println(aString);", the output is "hello.world!"

[James Boswell]

Tianpeng

You aren't changing the value of the original String. Any modification creates a new instance.