Which of the following is a mutable class in java?*1 pointjava.lang.Stringjava.lang.Bytejava.lang.Shortjava.lang.StringBuilder
Question
Which of the following is a mutable class in Java?
java.lang.Stringjava.lang.Bytejava.lang.Shortjava.lang.StringBuilder
Solution
The mutable class in Java from the given options is java.lang.StringBuilder.
Here's why:
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java.lang.String: Strings in Java are immutable, which means once a String object is created it cannot be changed. If any operation is performed on the String, a new String is created.
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java.lang.Byte: Byte is a wrapper class in java. It is immutable because it does not provide any method to change its state after it is created.
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java.lang.Short: Short is also a wrapper class in java. It is immutable for the same reason as Byte.
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java.lang.StringBuilder: StringBuilder
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