Chapter 2: Programs, Data, Variables, and Calculations

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Chapter 2 Programs, Data, Variables, and
Calculations
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Primitive Data Types

• Numerical
• Byte (8 bits)
• Short (16 bits)
• Int (32 bits)
• long (64 bits)
• Float (32 bits)
• Double (64 bits)

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Arithmetic Operators

• -
• / (pay attention to integer division)
• Example Fruit.java AverageFruit.java

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Other Operators

• , --
• () casting
• Op
• Bitwise operators (, , , , gtgt, ltlt, gtgtgt)

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Mathematical Functions

• All in Math class that is imported automatically
  in java.lang package
• Examples
• Math.sqrt()
• Math.sin()
• Math.max()
• Math.round()
• Example MathCalc.java

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Primitive Data Types

• Characters
• char (16 bits)
• Escape characters (\b, \f, \n, \r, \t, \u)
• String a series of character. Not a primitive
  data type, it is a class

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Primitive Data Types

• Logical
• boolean (1 bit)
• Two constants true and false
• Comments // or / . /