Study Daily day03

Original teacher link

Computer hardware

• cpu
• RAM
• hard disk

Unit of data

• bit
  • A bit is a 0 or a 1 that the computer can recognize
• Byte
  • 1Byte=8bit
• 1GB
  • 1024MB

Identifier naming convention

• Identifier command
  • See the name
• Multi-word naming
  • Word split userloginflag
    • Underscore
      • user_login_flag
    • Little Hump Nomenclature
      • userLoginFlag
    • Big Hump Nomenclature
      • UserLoginFlag

Identifier naming rules

Subsequent dollar number

• Constituent elements
  • digital
  • letter
  • Underscore
  • Dollar sign
• beginning
  • Cannot start with a number
• Key words
  • Cannot have the same name as the keyword

type of data

• Basic data type

  • Integer
  • Decimal
  • Boolean
  • character

• Reference data type

  • String
  • Array
  • Object

• Integer type

Decimal type

• Boolean type

  

• Character type

  

• String type

  

Import external java files

https://www.ixigua.com/6886829371437351432/?utm_source=xiguastudio

Find and replace

https://www.ixigua.com/6886847414318137870/?utm_source=xiguastudio