[#GROOVY-2817] Off by one error on string indexing error reporting

groovy

Off by one error on string indexing error reporting

Created: 10/May/08 06:41 AM Updated: 12/May/08 12:50 AM

Component/s:

None

Affects Version/s:

1.6-beta-2

Fix Version/s:

1.5.7, 1.6-beta-2

Time Tracking:

Not Specified

Environment:

Ubuntu 8.04 Hardy Heron

Description

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The following says it all really :

|> groovy -e "println ( 'ab'[4] )"
Caught: java.lang.StringIndexOutOfBoundsException: String index out of range: 5
	at script_from_command_line.$cs$2(script_from_command_line)
	at script_from_command_line.run(script_from_command_line:1)
	at script_from_command_line.main(script_from_command_line)

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Paul King - 12/May/08 12:50 AM

This is kind of Java behavior kicking in but certainly not obvious:

String bar = "bar";

// this produces: java.lang.StringIndexOutOfBoundsException: String index out of range: 3
bar.charAt(3));

// these produce: java.lang.StringIndexOutOfBoundsException: String index out of range: 4
bar.substring(3,4));
bar.subSequence(3,4));

Even more confusing:

// this produces: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
bar.substring(3,2));