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Chapter 13 Using JavaBeans with JSP

Automatic Type Conversions

Table 13.1 summarizes the automatic type conversions performed when a

bean property is automatically associated with an input parameter. One warn 

ing is in order, however: both JSWDK 1.0.1 and the Java Web Server 2.0 have

a bug that causes them to crash at page translation time for pages that try to

perform automatic type conversions for properties that expect 

double

 values.

Tomcat and most commercial servers work as expected.

Core Warning

With the JSWDK and the Java Web Server, you cannot associate properties 

that expect double precision values with input parameters. 

Table 13.1 Type Conversions When Properties Are Associated with 

Input Parameters 

Property Type Conversion Routine

boolean

Boolean.valueOf(paramString).booleanValue()

Boolean

Boolean.valueOf(paramString)

byte

Byte.valueOf(paramString).byteValue()

Byte

Byte.valueOf(paramString)

char

Character.valueOf(paramString).charValue()

Character

Character.valueOf(paramString)

double

Double.valueOf(paramString).doubleValue()

Double

Double.valueOf(paramString)

int

Integer.valueOf(paramString).intValue()

Integer

Integer.valueOf(paramString)

float

Float.valueOf(paramString).floatValue()

Float

Float.valueOf(paramString)

long

Long.valueOf(paramString).longValue()

Long

Long.valueOf(paramString)

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