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
if Selection

if Single-Selection Statement 

}Pseudocode

  If student’s grade is greater than or equal to 60
       Print “Passed”

}If the condition is false, the Print statement is ignored, and the next pseudocode statement in order is performed

}Indentation

  §Optional, but recommended

  §Emphasizes the inherent structureof structured programs

}The preceding pseudocode If inJava:

  if ( studentGrade >= 60 )
       System.out.println(
"Passed" );





ifelseDouble-Selection Statement

}ifelse double-selection statement—specifyan action to perform when the condition is true and a different action when thecondition is false. }Pseudocode

  If  student’s grade is greater than or equal to 60
                 Print “Passed”
            Else
                Print “Failed”

}The preceding If…Else pseudocode statement inJava:

  if ( grade >= 60)
       System.out.println(
"Passed" );
    else
       System.out.println( "Failed" );

}Note that the body of the elseis also indented.