multiple constructors in java

Question

class Objectsmultiplecnstrctrs {

    public static void main(String args[]){

        ObjectsForMultipleConstructors engg2=new ObjectsForMultipleConstructors(1);
        ObjectsForMultipleConstructors engg3=new ObjectsForMultipleConstructors(1,2);
        ObjectsForMultipleConstructors engg=new ObjectsForMultipleConstructors(1,2,3);

    }
}

// secondary class


public class ObjectsForMultipleConstructors {
    private int hour;
    private int minute;
    private int second;


    public ObjectsForMultipleConstructors(int h){
        this.hour=h;
        System.out.printf("give one ",+hour);

    }

    public ObjectsForMultipleConstructors(int h,int m){
        System.out.printf("goddamn ",+m);
    }

    public ObjectsForMultipleConstructors(int h,int m,int s){
        System.out.println("guess");

    }
}

OUTPUT is give one goddamn guess

Now the thing is i have declared int hour =h and value of h I assigned in the arguments in the main class,so im expecting the value of h which i defined to be displayed next to the text (System.out.printf("goddamn ",+m);) ,,but its doing what i want it to do ,where im missing

I assume you mean not 'doing what I want', but you haven't specified that in enough detail. What are you getting instead? Compile error? Exception? Unexpected output? At the moment there is no question here. — user207421
– user207421, Commented Mar 25, 2012 at 9:17
Unless you show your main method, no-one will be able to guess what you're talking about. — crowne
– crowne, Commented Mar 25, 2012 at 9:22

masay · Accepted Answer · 2012-03-25 09:20:56Z

3

Why you use comma System.out.printf("give one ",+hour); ?

it must be System.out.printf("give one " + hour);

the description of printf usage is :

A convenience method to write a formatted string to this output stream using the specified format string and arguments. An invocation of this method of the form out.printf(format, args) behaves in exactly the same way as the invocation out.format(format, args) Parameters: format A format string as described in Format string syntax args Arguments referenced by the format specifiers in the format string. If there are more arguments than format specifiers, the extra arguments are ignored. The number of arguments is variable and may be zero. The maximum number of arguments is limited by the maximum dimension of a Java array as defined by the Java Virtual Machine Specification. The behaviour on a null argument depends on the conversion.

edited Mar 25, 2012 at 9:20

answered Mar 25, 2012 at 9:15

masay

9332 gold badges17 silver badges35 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Ben van Gompel Over a year ago

I think he's mixing System.out.print with System.out.printf. So, it should probably be either System.out.print("give one " + hour); or System.out.printf("give one %d", hour);.

rsp · Accepted Answer · 2012-03-25 09:19:07Z

1

In order to format and print arguments to printf() you need to specify them in the pattern string, like:

System.out.printf("give one %d ", hour);

answered Mar 25, 2012 at 9:19

rsp

23.4k6 gold badges59 silver badges72 bronze badges

Comments

Chetter Hummin · Accepted Answer · 2012-03-25 09:19:03Z

0

You need to have a format specifier as well in a printf statement

System.out.printf("give one %d ",hour);

answered Mar 25, 2012 at 9:19

Chetter Hummin

6,8478 gold badges34 silver badges45 bronze badges

Comments

Chandra Sekhar · Accepted Answer · 2012-03-25 09:20:03Z

0

I think its because you have not used %d access specifier in the method printf

answered Mar 25, 2012 at 9:20

Chandra Sekhar

19.5k18 gold badges88 silver badges133 bronze badges

Collectives™ on Stack Overflow

multiple constructors in java

4 Answers 4

1 Comment

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related