Java™ Application Development on Linux - Dator

78Chapter 3An Experienced Programmer’s Introduction to JavaExample 3.22 Use of a finally clausetry {for (i = 0; i < max; i++) {someobj.methodB(param1, i);} // next i} catch (SpecialException sp) {System.out.println(sp.whatWentWrong());} catch (AlternateException alt) {alt.attemptRepair(param1);throw alt; // pass it on} catch (Exception e) {// do the error handling here:System.out.println(e.toString());e.printStackTrace();} finally {// Continue execution here after any catch// or after a try with no exceptions.// It will even execute after the AlternateException// before the throw takes execution away from here.gone = true;someobj = null;}3.2.5 print(), println(), printf()We’ve already used println() in several examples, and assumed that you canfigure out what it’s doing from the way we have used it. Without going wholehoginto an explanation of Java I/O and its various classes, we’d like to say alittle more about the three various output methods on a PrintStream object. 6Two of the methods, print() and println(), are almost identical. Theydiffer only in that the latter one appends a newline (hence the ln) at the endof its output, thereby also flushing the output. They expect a String as theironly argument, so when you want to output more than one thing, you add theStrings together, as in:6. The mention of the PrintStream object was meant to be a hint, to tell you that you canfind out more about this sort of thing on the Javadoc pages for the PrintStream object.