java.util.scanner - Scanner class in Java5 throw java.lang.NullPointerException -

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i using scanner class in java5, , following code throw exception:

scanner scanner = new scanner         (new file(args[0])); int dealid; while (scanner.hasnextline()) {     dealid = scanner.nextint();     system.out.println(dealid); } scanner.close();

the stacktrace is:

exception in thread "main" java.lang.nullpointerexception    @ java.util.regex.matcher.tomatchresult(libgcj.so.10)    @ java.util.scanner.mycorenext(libgcj.so.10)    @ java.util.scanner.mypreparefornext(libgcj.so.10)    @ java.util.scanner.mynextline(libgcj.so.10)    @ java.util.scanner.hasnextline(libgcj.so.10)

does knows caused exception?

the gcj home page suggest "supports of 1.4 libraries plus 1.5 additions. "

scanner added in version 1.5 , suspect have hit piece of functionality gcj doesn't support. need try different see can work.

is there reason not using openjdk/oracle java 6 or 7? (please don't performance reasons ;)


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