Convert 1d array to multidimensional array in java

Question

Lets say I have 1d array

String teams[]={"Michael-Alex-Jessie","Shane-Bryan"};

and I want to convert it to multidimensional array which will be like this

String group[][]={{Michael,Alex,Jessie},{Shane,Bryan}}.

I try to use delimeter but for unknown reason I cannot assign the value of 1d to 2d array. It said incompatible types. Please any help will be much appreciated. Here is my code.

String [][]groups ; 
String teams[]={"Michael-Alex-Jessie","Shane-Bryan"};
int a=0,b=0;
String del ="-/"; 

    for (int count = 0; count < teams.length; count++)
    {
       groups[a][b] = teams[count].split(del);
       a++;
    }

You've declared your 2D array, but you haven't initialized it (i.e. groups = new String[x][y]) - also, whenever asking a question where you're getting an error message, you want to post the error message as well. — jefflunt
– jefflunt, Commented Dec 22, 2011 at 14:46
Yes thanks for reminding me.The error occur at groups[a][b] = teams[count].split(del);When I'm assigning the value of 1d to 2d array and it said incompatible type required java.lang.string found java.lang.string[]. — user1110191
– user1110191, Commented Dec 22, 2011 at 14:54

AlexR · Accepted Answer · 2011-12-22 14:49:01Z

3

Type of group[a][b] is String but you are attempting to assign string array (i.e. String[]) there.

This is what you really want to do:

for (int count = 0; count < teams.length; count++) {
   groups[count] = teams[count].split(del);
}

answered Dec 22, 2011 at 14:49

AlexR

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1 Comment

user1110191 Over a year ago

Do you know any better idea to place them in multidimensional array?

andrey · Accepted Answer · 2011-12-22 14:48:39Z

0

Yoy can't assign array of Strings returned by "teams[count].split(del)" to String

public class qq {
String[][] groups;
String teams[] = { "Michael-Alex-Jessie", "Shane-Bryan" };
int a = 0, b = 0;

public void foo() {
    String del = "-/";
    groups = new String[teams.length][];
    for (int count = 0; count < teams.length; count++) {
        groups[count] = teams[count].split(del);
        a++;
    }
}
}

answered Dec 22, 2011 at 14:48

andrey

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2 Comments

user1110191 Over a year ago

Is there any other way where I can place the value in multidimensional array?

andrey Over a year ago

@user1110191 - this algorithm is so silly and primitive so I can't understand what do you mean by saying "better way"

rsp · Accepted Answer · 2011-12-22 14:49:15Z

0

You need to assign an array value, not a cell value:

   groups[count] = teams[count].split(del);

answered Dec 22, 2011 at 14:49

rsp

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Comments

kbdjockey · Accepted Answer · 2011-12-22 14:49:35Z

0

String.split() return an Array of String, not a String

answered Dec 22, 2011 at 14:49

kbdjockey

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