2 elements in 1 v.add vector java

Question

For example, I am calling a scanner from the user.

double second = sc.nextDouble();
double multiplayer = sc.nextDouble();
v.add(second);
v.add(multiplayer);

And when I display the vector output these 2 inputs appear in 2 lines. Is there anyway to put these 2 elements in a single vector?

e.g. input second is 5.0
     input multiplayer is 1.4

display vector will be:

5.0
1.4

Is there anyway to make them in a single vector like

5.0 1.4?

Please help :(

It is still a single vector. Just that the display is multi-lined. — adarshr, Sep 02 '11 at 15:31
@Oli Charlesworth ListIterator iter = v.listIterator(); while (iter.hasNext()) { System.out.println((Double)iter.next()); This is how I display the vector. — Jolene, Sep 02 '11 at 15:39
@adarshr Really? So if I try getting the vector at that index, I'll get both values? — Jolene, Sep 02 '11 at 15:39
@Jolene: A `Vector` is like a box into which you put objects. You've put two apples (doubles) into this box. So depending on which one you want, you can access them using the index. `v.get(0)` will give you `second` where as `v.get(1)` will fetch you `multiplayer`. However, try to avoid using a `Vector` in the first place. `ArrayList` is a more modern collection for you. — adarshr, Sep 02 '11 at 15:45
@adarshr Wow thanks. I wasn't aware of that. I'm quite new to programming and I'm trying ways to do it instead of Array. But thank you all, I will try to explore :) — Jolene, Sep 02 '11 at 15:47
@Jolene You are using `System.out.println` instead of `System.out.print`. `System.out.println` adds the newline. See the [documentation](http://download.oracle.com/javase/6/docs/api/java/io/PrintStream.html) — S.L. Barth is on codidact.com, Sep 02 '11 at 15:47

score 3 · Answer 1 · edited May 23 '17 at 12:29

3

First, do not use Vector use an ArrayList (see this question/answer why).

List<Double> v = new ArrayList<Double>();
v.add(5.0);
v.add(1.4);

Using a for loop:

for (Double e : v) System.out.print(e);
System.out.println();

edited May 23 '17 at 12:29

Community

answered Sep 02 '11 at 15:35

dacwe

You might want to explain the `replaceAll` and give the non-replaced output as reference. – Philipp Reichart Sep 02 '11 at 15:58

score 0 · Answer 2 · answered Sep 02 '11 at 15:31

0

for ( Double d : v ) { System.out.print( d ); }

You may wish to put a System.out.println(); in front of that, so that the contents of the Vector are printed on a new line.

answered Sep 02 '11 at 15:31

2 Answers2