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Section 2.7 Assessment: Construct A Scanner

Subsection 2.7.1 Subgoals for using objects (creating instances)

  1. Declare variable of appropriate class datatype.

  2. Assign to variable: keyword new, followed by class name, followed by ().

  3. Determine whether parameter(s) are appropriate (API)

    1. Number of parameters

    2. Data types of the parameters

Exercises 2.7.2 Exercises

1.

    Q1: Fill in the blanks for the following code, if the purpose of the code is to create a new Scanner instance called input.

    ___A___ ___B___ = ___C___ ___D___(___E___);

    Fill in blank A.

  • Scanner

  • input

  • new

  • System.in

2.

    Q2: Fill in the blanks for the following code, if the purpose of the code is to create a new Scanner instance called input.

    ___A___ ___B___ = ___C___ ___D___(___E___);

    Fill in blank B.

  • Scanner

  • input

  • new

  • System.in

3.

    Q3: Fill in the blanks for the following code, if the purpose of the code is to create a new Scanner instance called input.

    ___A___ ___B___ = ___C___ ___D___(___E___);

    Fill in blank C.

  • Scanner

  • input

  • new

  • System.in

4.

    Q4: Fill in the blanks for the following code, if the purpose of the code is to create a new Scanner instance called input.

    ___A___ ___B___ = ___C___ ___D___(___E___);

    Fill in blank D.

  • Scanner

  • input

  • new

  • System.in

5.

    Q5: Fill in the blanks for the following code, if the purpose of the code is to create a new Scanner instance called input.

    ___A___ ___B___ = ___C___ ___D___(___E___);

    Fill in blank E.

  • Scanner

  • input

  • new

  • System.in

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