Notes

Outline

Introduction to the Java Language Data Types Operators Control Flow Statements Arrays Functions -- Static Methods View Classes as modules

Exampe1: Hello.java

Data Types byte,short,int,long float,double char boolean reference array object

Operators Arithmetic operators +, -, *, /, %, ++, -- Relational operators >, >=, <, <=, ==, != Conditional operators &&,  ||,  ! Bitwise operators >>, <<, >>>, &, |, ^, ~

Control Flow Statements decision making if-else, switch-case loop for, while, do-while exception try-catch-finally, throw miscellaneous break, continue, label: , return

Arrays Dynamic Anonymous array a.length

Example 2: Max.java

Example 3: PrintArray

Functions -- Static Methods

Functions -- Static Methods

View Classes as Modules

View Classes as Modules

Review Java language constructs types operators control statements arrays View classes as modules of functions static methods

View Classes as  Data Types (struct) How to write functions that return multiple values In C, use pointers In Java, use objects

View Classes as Structures Java C

Difference between Objects and Structures Java Call by reference actual argument is updated C Call by value actual argument does not change

Functions That Return Multiple Values

Exercises static Point center(Rectangle r) return the center point of r. static int area(Rectangle r) return the area of r. static boolean isCenter(Rectangle r, Point p)