Lecture4

Server-side Web Programming Lecture 4: Java Server Pages for Complex Forms

Parsing Numeric Input ,[object Object],[object Object],This is “5”, not the number 5!

Parsing Numeric Input ,[object Object],[object Object],[object Object],[object Object]

Numeric Input Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Complex Input Elements ,[object Object],[object Object],[object Object],[object Object],[object Object]

Checkbox HTML ,[object Object],[object Object],[object Object],[object Object]

Checkbox JSP ,[object Object],[object Object],[object Object],[object Object]

Conditions in Java ,[object Object],[object Object],[object Object],[object Object],[object Object]

Conditional HTML Display ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Checkbox Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],If this Java condition is true (the monitor is not null ) Display this html

Radio Button HTML ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Radio Button JSP ,[object Object],[object Object],[object Object],[object Object],[object Object]

String Comparison ,[object Object],[object Object],[object Object]

Null Input ,[object Object],[object Object],[object Object],[object Object]

Detecting Null Input ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Detecting Null Input ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Detecting Null Input ,[object Object]

List HTML ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

List JSP ,[object Object],[object Object],[object Object],[object Object],[object Object]

Multiple Selection Lists ,[object Object],[object Object],[object Object]

JSP for Multiple Selection Lists ,[object Object],[object Object],Returns array of values passed for this name peripherals 0 “ Camera ” 1 “ Scanner ”

Looping Through Arrays ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Note: Java has built-in length property for array which evaluates to its size

Looping Through Arrays in JSP ,[object Object],[object Object],[object Object],For each value in the peripherals array Display that value in html peripherals[0] peripherals[1]

Checking for NULL Lists ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Checking for NULL Lists ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Only executed if peripherals exist

Lecture4

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Lecture4