Can't understand textbooks question and there is no solution to view?

Hi everyone,

I'm new to the JAVA programming language and have recently begun teaching myself the fundamentals by following a book called Java: How To Program (7th edition) by Deitel. I'm at the end of Chapter 2 and I am stumped on a question that for some reason has no solution in the book. The earlier bits of the Chapter Review showed answers to the questions so I could at least compare.

Anyway here is the question -- could anyone tell me what it is asking for?

Write an application that displays the numbers 1 to 4 on the same line, with each pair of adjacent numbers separated by one space. Write a program using the following techniques:

a) Use one System.out.println statement.
b) Use four System.out.print statement.
c) Use one System.out.printf statement.


Here are my answers ... but I am still unsure.

Code:

---

a) System.out.println("12 34");

b) System.out.print("1");
    System.out.print("2 ");
    System.out.print("3");
    System.out.print("4");

c) System.out.printf("%d%d %d%d",1,2,3,4);

Any help is appreciated, thanks.

---

a) and c) look ok but your answer for b) took 4 statements but were told to only use 1.

Quote:

---

Originally Posted by Junky

a) and c) look ok but your answer for b) took 4 statements but were told to only use 1.

---

Sorry the book said use (4) statements for b) but I wrote one. So you interpret the question the same way I do?

Ok have you typed up the code, compiled and run it? Did you get the results you expected?

The code has been typed and executed, that isn't the issue. I don't have any point of reference to tell whether or not I am correct. There is no answer/solution in the book so I do not know if I have understood the question?

You know you are correct when the code produces the correct output.

Quote:

---

Originally Posted by Junky

You know you are correct when the code produces the correct output.

---

Yes but what I am saying in both the post and thread title is I don't know what the correct output is supposed to be.

your part B looks correct as well. I guess they were trying to get you to understand the difference between System.out.print and System.out.println
In part B you have: b) Use four System.out.print statement.

Code:

---

System.out.print("1");
    System.out.print("2 ");
    System.out.print("3");
    System.out.print("4");

---

And that does produce "12 34". So it should be correct.

If you have 2 System.out.println statements, 2 different lines are output to the console, whereas with the System.out.print in succession, you get the output on the same line.

Good job.

Quote:

---

Originally Posted by Junky

You know you are correct when the code produces the correct output.

---

Don't be so existentialistic.

kind regards,

Jos ;-)