string to array in java

Question

i have this arraylist and i want to put the data in array.but i have the problem to separate the data. ArrayList data_list:

g e r m a n y
a u s t r a l i a
n e w z e a l a n d
e n g l a n d
c o s t a r i c a
p h i l i p i n a
m y a n m a r
t h a i l a n d

note:each of letter is separate by space. i want to separate the name of the country to into separate letter such as germany becomes g e r m a n y i plan to convert the arraylist to 2d array.so the output become like this: String[][] country;

country[0][0]=g
country[0][1]=e
country[0][2]=r
country[0][3]=m
country[0][4]=a
country[0][5]=n
country[0][6]=y

country[1][0]=a
country[1][1]=u
country[1][2]=s
country[1][3]=t
country[1][4]=r
country[1][5]=a
country[1][6]=l
country[1][7]=i
country[1][8]=a

anyone can help me?

Is our original ArrayList an array list of String ?

Petar Ivanov
– Petar Ivanov

2011-07-25 06:51:56 +00:00
Commented Jul 25, 2011 at 6:51 — Petar Ivanov
– Petar Ivanov, Commented Jul 25, 2011 at 6:51

Love Hasija · Accepted Answer · 2011-07-25 06:50:38Z

1

Use toCharArray() method of String class.

answered Jul 25, 2011 at 6:50

Love Hasija

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migu · Accepted Answer · 2011-07-25 07:14:19Z

0

If your ArrayList looks like this:

List<String> countries = Arrays.asList("g e r m a n y", "a u s t r a l i a", "n e w z e a l a n d",
    "e n g l a n d", "c o s t a r i c a", "p h i l i p i n a", "m y a n m a r", "t h a i l a n d");

Then you can create your array of characters this way:

String[][] countryLetters = new String[countries.size()][];
for (int i = 0; i < countries.size(); i++) {
    String country = countries.get(i);
    countryLetters[i] = country.split(" ");
}
// test output
for (String[] c : countryLetters) {
    System.out.println(Arrays.toString(c));
}

The test output is

[g, e, r, m, a, n, y]
[a, u, s, t, r, a, l, i, a]
[n, e, w, z, e, a, l, a, n, d]
[e, n, g, l, a, n, d]
[c, o, s, t, a, r, i, c, a]
[p, h, i, l, i, p, i, n, a]
[m, y, a, n, m, a, r]
[t, h, a, i, l, a, n, d]

answered Jul 25, 2011 at 7:14

migu

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2 Comments

Roubie Over a year ago

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0

migu Over a year ago

What code do you run actually? The above code alone runs without problems! (e.g. inside of a test method or static main method)

Sap · Accepted Answer · 2011-07-25 06:57:03Z

0

    String a = "germany";
    String b = "india";
    char[] ar = a.toCharArray();
    char[] br = b.toCharArray();
    char [][] td = new char[2][2];
    td[0] = ar;
    td[1] = br;
    System.out.println(td);
    System.out.println(td[0][0]+""+td[0][1]+""+td[0][2]+""+td[0][3]+""+td[0][4]+""+td[0][5]+""+td[0][6]);

answered Jul 25, 2011 at 6:57

Sap

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1 Comment

Roubie Over a year ago

what is this?i dont understand

Petar Ivanov · Accepted Answer · 2011-07-25 07:18:34Z

0

ArrayList<String> orig = new ArrayList<String>();
orig.add("G e r m a n y");
orig.add("A u s t r a l i a");

String[][] newArray = new String[orig.size()][];
int i = 0;
for(String s : orig)
    newArray[i++] = s.split(" ");

edited Jul 25, 2011 at 7:18

answered Jul 25, 2011 at 6:55

Petar Ivanov

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2 Comments

aioobe Over a year ago

If you need the index in the loop, I usually avoid for-each loops. (Among other things, it limits the scope of the "temporary" variable.)

migu Over a year ago

This solution doesn't handle the spaces between the letters.

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