20.7

java.lang.Integer

THE PACKAGE JAVA.LANG

In other words, this method returns an

Integer

 object equal to the value of:

getInteger(nm, new Integer(val))

but in practice it may be implemented in a manner such as:

Integer result = getInteger(nm, null);

return (result == null) ? new Integer(val) : result;

to avoid the unnecessary allocation of an

Integer

 object when the default value is

not needed.

20.7.23

public static Integer getInteger(String nm, Integer val)

The first argument is treated as the name of a system property to be obtained as if

by the method

System.getProperty

 ( 20.18.9). The string value of this prop 

erty is then interpreted as an integer value and an

Integer

 object representing this

value is returned.

If the property value begins with the two ASCII characters

0x

 or the ASCII

character

#

, not followed by a minus sign, then the rest of it is parsed as a

hexadecimal integer exactly as for the method

Integer.valueOf

 ( 20.7.20)

with radix

16

.

If the property value begins with the ASCII character

0

 followed by another

character, it is parsed as an octal integer exactly as for the method

Inte 

ger.valueOf

 ( 20.7.20) with radix

8

.

Otherwise, the property value is parsed as a decimal integer exactly as for the

method

Integer.valueOf

 ( 20.7.20) with radix

10

.

The second argument serves as a default value. If there is no property of the

specified name, or if the property does not have the correct numeric format, then

the second argument is returned.

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