Practice Creating A Scanner Object (10.3.2) - Input/Output in Java

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8 questions

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6 sample questions

Question 1.
What is the purpose of the Scanner class in Java?
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Think about user interactions in a program.
Question 2.
How do you create a Scanner object?
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Remember the syntax for creating objects.
3Question 3.
What is the correct way to create a Scanner object?
- Scanner sc = new Scanner();
- Scanner sc = new Scanner(System.in);
- Scanner sc = new Scanner(null);
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Think about how we specify sources in Java.
4Question 4.
Is it necessary to close a Scanner after using it?
- True
- False
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Think about resource management.
Question 5.
Create a Java program that uses a Scanner to ask the user for their favorite color and then prints a message with the input. Ensure to handle exceptions if the input is not as expected.
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Make sure to use a try-catch to handle potential input errors.
Question 6.
Modify the previous program to ask for a number after the color and print both values. How would you handle input if they input a non-numeric value for the number?
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Think about input validation and exception handling.

4 more questions in this section. Enroll free to practise them all.