class hello{ public static void main(String args[]) { if(args.length == 0){ System.out.println("No args"); System.exit(0); } if(isInt(args[0]) == true){ System.out.println("args[0] is a integer"); }else if(isFloat(args[0]) == true){ System.out.println("args[0] is a float"); }else{ System.out.println("other"); } System.exit(0); } static private boolean isInt(String str){ boolean result = false; try{ int num = Integer.parseInt(str); result = true; } catch (NumberFormatException e) { } return result; } static private boolean isFloat(String str){ boolean result = false; try{ float num = Float.parseFloat(str); result = true; } catch (NumberFormatException e) { } return result; } }
Tuesday, December 17, 2013
Check type (int, float...) of args
The example check the type of the first argument:
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