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Oct 16th, 2009

printf and three string arguments

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Hi all, I hope you are well. I am trying to compile a java file using terminal in Ubuntu, but I am getting the following error message:

Quote ...

1. ERROR in StringComparisons.java (at line 20)
System.out.printf("String a = %s String b = %s \n", a,b);

As you can see, I am passing three String arguments to the printf method, which, as far as I can tell from the API is perfectly legal as this would correspond to the object varargs printf method.

Quote ...

printf

public PrintStream printf(String format,
Object... args)

A convenience method to write a formatted string to this output stream using the specified format string and arguments.

Interestingly, this compiles & executes fine in NetBeans (on the same machine, so same JDK version). Please can someone tell me if I have missed something here? Many thanks.

Last edited by majestic0110; Oct 16th, 2009 at 1:24 pm.

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majestic0110

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Oct 16th, 2009

Re: printf and three string arguments

bug?
test:

Java Syntax (Toggle Plain Text)
String format = "String a = %s String b = %s \n";
        System.out.printf(format, a, b);
        System.out.printf("String a + %s String b + %s \n", a, b);
        System.out.printf(new String("String a = %s String b = %s \n"), a, b);
        System.out.printf("String a " + "=" + " %s String b " + "=" + " %s \n", a, b);
        System.out.printf("String a " + '=' + " %s String b " + '=' + " %s \n", a, b);
String format = "String a = %s String b = %s \n";
        System.out.printf(format, a, b);
        System.out.printf("String a + %s String b + %s \n", a, b);
        System.out.printf(new String("String a = %s String b = %s \n"), a, b);
        System.out.printf("String a " + "=" + " %s String b " + "=" + " %s \n", a, b);
        System.out.printf("String a " + '=' + " %s String b " + '=' + " %s \n", a, b);

compile one test at the same time
post result

quuba

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Oct 18th, 2009

Re: printf and three string arguments

Hi quuba, thanks for the reply. Having tried that, I still get the same compilation error at the command line, although it works fine in NetBeans. Seems very odd!

majestic0110

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Oct 18th, 2009

Re: printf and three string arguments

Which one of 2,..,6 lines in my post #2 gives you compilation error at the command line?

quuba

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Oct 18th, 2009

Re: printf and three string arguments

They all do quuba lol i.e the ones with >= 3 arg's to printf

Last edited by majestic0110; Oct 18th, 2009 at 8:49 pm.

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Oct 19th, 2009

Re: printf and three string arguments

Compile with additional javac options to obtain more info:

Java Syntax (Toggle Plain Text)

javac -help
 
javac -version
 
javac -g -verbose StringComparisons.java
 
pause

? odd.
check also from command line version of java
if 1.5 - bad
if >1.5 - ok.

http://java.sun.com/docs/books/tutor...berformat.html

Quote ...

Here is a basic example:
int i = 461012;
System.out.format("The value of i is: %d%n", i);
The %d specifies that the single variable is a decimal integer. The %n is a platform-independent newline character.

Last edited by quuba; Oct 19th, 2009 at 11:50 am.

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