Question: please answer as soon as possible. please explain . I will definitely upvote. Why string objects are immutable in java eg: String str = Good

Why string objects are immutable in java eg: String str = "Good

please answer as soon as possible.
please explain . I will definitely upvote.

Why string objects are immutable in java eg: String str = "Good morning"; String str = str + "Hello" From above example we are able to modify the String variable str. Then why String objects are immutable in jowa.

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