Java - Strings and String Handling
You want to replace all spaces in a string with underscores and keep the original string unchanged. Which approach is correct?
You want to replace all spaces in a string with underscores and keep the original string unchanged. Which approach is correct?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand string immutability
Original string cannot be changed; methods return new strings.Step 2: Correct way to replace characters
Assign the result ofreplace()to a new string variable to keep original unchanged.Final Answer:
Use newString = original.replace(' ', '_'); and keep original as is -> Option DQuick Check:
Assign replace() result to new string to keep original [OK]
Quick Trick: Assign replace() result to new variable; original stays unchanged [OK]
Common Mistakes:
- Calling replace() without assignment and expecting change
- Trying to modify original string characters directly
- Using toCharArray() but not converting back to string
Master "Strings and String Handling" in Java
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