split into arrays from a string array

Question

I am using Java 1.4 for an old project.

I have a string array

 String a[0]={"200,300"}
 String a[1]={"700,500"}
 String a[2]={"900,400"} 

as so on,

for this I need to create 2 string array to get the first value in a string array and second value in different string array.

ex:

String a[0]="200"
String a[1]="700"
String a[2]="900"
String b[0]="300"
String b[1]="500"
String b[2]="400"

I am not getting how can I do this.

• Zaheer Ahmed: what have u tried to solve it?
• AurA: Hint : Assign array's 0th index data to a array and 1st index data to b. Also reconsider the array declaration for the string array you made...
• Sunil: I had a logic like I can create two string array where in first string array I can eliminate the first value where as in second one I will eliminate the value after ',' .but that code is not working properly.
• Prasad: @upadhyaykc take a look at my answer below.
• Sunil: @Prasad : The code is giving junk value for 2nd record.

Answer 1

If the length of the string array is known,

String[] newString = new String [6];
int count = 0;
for(int i = 0; i<3 ; i++){
 newString[i] = a[i];
 count++;
}
for(int j=0; j<3; j++){
 newString[count] = b[j];
 count++;
}

EDIT: Previously i got your question wrong. The following solution will help you. to divide a into 2 string arrays.

 String a[] = new String [3];
 a[0]={"200,300"};
 a[1]={"700,500"};
 a[2]={"900,400"};
 String[] newStr1 = new String [a.length];
 String[] newStr2 = new String [a.length];
 for(int i = 0; i<3 ; i++){
 String [] x= a[i].split(",");
 newStr1[i] = x[0];
 newStr2[i] = x[1];
 }

• Prasad: {200,300} on splitting this string you get {200 in x[0] to avoid 1st { i used substring()
• Sunil: @dbw: why have you deleted your post that gave me exact result. :) :)
• Deepak Bhatia: @upadhyaykc I deleted because I thought the array elements are stored with brackets as told by Prasad
• Prasad: @upadhyaykc why you've removed tick from the answer BTW?
• Sunil: @prasad: Sorry Prasad,Because before editing it was giving junk value for 2nd record which I already mention in my previous comment.

Answer 2

Looking at your code, this provides you the correct solution,

int n = 3; //This can change as your array size is not known
String a[] = new String [n];
 a[0]="200,300";
 a[1]="700,500";
 a[2]="900,400"; //And So on
String[] b1 = new String [n];
String[] b2 = new String [n];
for(int i = 0; i<n ; i++)
{
 String [] numbers= a[i].split(",");
 b1[i] = numbers[0];
 b2[i] = numbers[1];
}

Answer 3

First you cant defined String array as string a[1]={700,500}. It is wrong way.

And second, Here is what you want :

a[0]=new String[]{"200","300"};
a[1]=new String[]{"700","500"};
a[2]=new String[]{"900","400"};
String x[] = new String[a.length];
String y[] = new String[a.length];
for(int i=0;i<a.length;i++){
 x[i] = a[i][0];
 y[i] = a[i][1];
}

• Sunil: it is given an error " the type of expression must be an array type but it resolved to string" . my code is : 'String []strId=null; strId=req.getParameterValues("Id");'
• Vimal Bera: Define a like this : String a[][] = new String[3][2];
• Sunil: since I am storing only one parameter value which is like '200,700' I can not use 2Darray. :(