Thread: Copying Arrays

take a look in statement in your code for (j = lo + 1; j <= hi; j++) , your hi variable is 11, so last iteration of your loop will make your j variable equal to 11 since the condition is less than or equal. then you are attempting to access the element of B[j] which is similar to B[11], and that is where the ArrayIndexOutOfBoundsException occurs, the last element of array B can be access through B[10].

I replaced the 11 with 10, same problem :/

paste the error, and paste the line where the error exist.

System.out.printf("%d",B);

Exception in thread "main" java.util.IllegalFormatConversionException: d != [I
at java.util.Formatter$FormatSpecifier.failConversion (Formatter.java:4045)
at java.util.Formatter$FormatSpecifier.printInteger(F ormatter.java:2748)
at java.util.Formatter$FormatSpecifier.print(Formatte r.java:2702)
at java.util.Formatter.format(Formatter.java:2488)
at java.io.PrintStream.format(PrintStream.java:970)
at java.io.PrintStream.printf(PrintStream.java:871)
at worksheet6Quest29.CopyAndSortArray.main(CopyAndSor tArray.java:28)

so your problem now is about index of the array.
you cannot format an array object to decimal. try to replace it with System.out.printf("%d",B[index]);

It says index cannot be resolved to variable, do i have to declare index as 0?

The index that I declared is just a dummy variable, it is up to you on how you declare it

ok