Solution:Step 1: Recognize string immutabilityOriginal string "hello" is not changed; toUpperCase() returns a new string.Step 2: Understand assignment to ss now points to the new uppercase string, demonstrating immutability.Final Answer:Strings are immutable; methods return new strings -> Option AQ

[Solved] Given this code:String s = "hello";s = s.toUpperCase();System.out.println(s);What does this demonstrate about strings in Java? | Java

Java - Strings and String Handling

Given this code:

String s = "hello";
s = s.toUpperCase();
System.out.println(s);

What does this demonstrate about strings in Java?

AStrings are immutable; methods return new strings

BtoUpperCase() modifies the original string

CStrings are mutable and change in place

DtoUpperCase() throws an exception on literals

Step-by-Step Solution

Solution:

Step 1: Recognize string immutability
Original string "hello" is not changed; toUpperCase() returns a new string.
Step 2: Understand assignment to s
s now points to the new uppercase string, demonstrating immutability.
Final Answer:
Strings are immutable; methods return new strings -> Option A
Quick Check:
String methods return new objects [OK]

Quick Trick: String methods return new strings; originals stay unchanged [OK]

Common Mistakes:

Assuming strings change in place
Expecting toUpperCase() to modify original string
Confusing immutability with mutability

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Given this code:

Step 1: Recognize string immutability

Step 2: Understand assignment to s

Final Answer:

Quick Check:

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