1Z0-829 Java I/O API and Securing Applications Practice Question
Which class is best suited for reading integer tokens from a string containing space-separated integers?
⚠ Common exam trap
Many candidates choose BufferedReader because it is familiar for reading text, but they overlook that Scanner provides direct tokenization and parsing methods, making it the more appropriate and efficient choice for this specific task.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Scanner
Scanner is best suited because it provides built-in methods like nextInt() that can parse space-separated integer tokens directly from a string, handling whitespace delimiters automatically. It is designed for parsing formatted input, making it the ideal choice for this task.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
InputStreamReader
Why it's wrong here
InputStreamReader is for reading bytes as characters, not for parsing tokens.
- ✗
BufferedReader
Why it's wrong here
BufferedReader reads entire lines; it does not parse tokens.
- ✗
DataInputStream
Why it's wrong here
DataInputStream reads binary data, not text.
- ✓
Scanner
Why this is correct
Scanner has nextInt() and can parse integers from a string directly.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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