Awk and Perl are tools built on another language that does stream copying i.e. read stdin and write stdout. You could build Awk and Perl in Java if you wanted

Awk and Perl are tools built on another language that does stream copying i.e. read stdin and write stdout. You could build Awk and Perl in Java if you wanted and have the same result. System.out.println("hello world"); Is the same as: printf("hello world\n");