目录

  • 1 Introduction
    • 1.1 Introduction
    • 1.2 Machine Lang, Assembly lang and High-level lang
    • 1.3 History of Java
    • 1.4 Characteristics of Java
    • 1.5 Typical Java Development Environment
    • 1.6 Introduction to Java Application
  • 2 Classes and Objects
    • 2.1 Primitive Types vs. Reference Types
    • 2.2 Classes and Objects
      • 2.2.1 Declaring a Class
      • 2.2.2 Local and Instance Variables
      • 2.2.3 Methods: A Deeper Look
      • 2.2.4 Constructors
  • 3 Control Statements
    • 3.1 Control Structures
    • 3.2 if Selection
    • 3.3 while Repetition
    • 3.4 for Repetition
    • 3.5 do…while repetition
    • 3.6 switch multiple-selection
  • 4 Arrays and Collections
    • 4.1 Arrays
    • 4.2 ArrayList
    • 4.3 Set
    • 4.4 Generic Programming
  • 5 Object-Oriented Programming: Inheritance
    • 5.1 Inheritance
    • 5.2 Superclasses and Subclasses
    • 5.3 Constructors in Subclasses
  • 6 Object-Oriented Programming: Polymorphism
    • 6.1 Polymorphism
    • 6.2 Polymorphic Behavior
    • 6.3 Enable and Disable Polymorphism
  • 7 Exception Handling
    • 7.1 Exceptions
    • 7.2 Error-Handling
  • 8 Java I/O
    • 8.1 Java I/O Streams
    • 8.2 Decorator Design Pattern
  • 9 GUI Components
    • 9.1 AWT and SWING
    • 9.2 Event Model
  • 10 Multithreading
    • 10.1 Life Cycle of a Thread
    • 10.2 Thread Synchronization
    • 10.3 Producer/Consumer
switch multiple-selection

switch Multiple-Selection Statement

}switch multiple-selection statement performs different actions based on the possible values of a constant integral expression of type byteshortint or char.

}switch does not provide a mechanism for testing ranges of values—every value must belisted in a separate case label. 

}Note that each casecan have multiple statements.

}switch differs from other control statements in that it does not require braces around multiple statements in a case.

}Without break, the statements for a matching case and subsequent cases execute until a break or the end of the switchis encountered. This is called “falling through.” 

}If no match occurs between the controlling expression’s value and a case label, the default case executes. 

}If no match occurs and there is no default case, program control simply continues with the first statement after the switch.