grouping data of array

[neda]

I have sorted array of integer . how can I define new arrays with similar data .
indeed I want to grouping similar data of array .
example:
input : int num[] = {20,21,21,24,26,26,26,30};
output : A={20}
B={21,21}
C={24}
D={26,26,26}
E={30}
thanks

 

[nupur.kinger]

Hi Neda,

Well, I think the following code of lines should work for you :

int a = num[0];
List<Integer[]> listOfArrays = new ArrayList<Integer[]>();
int count = 0;
for(int i = 0 ; i<num.length ; i++) {
if(a == num) {
count ++;
} else {
Integer[] arr = new Integer[count];
for(int j = 0 ; j<arr.length ; j++) arr[j] = a;
listOfArrays.add(arr);
a = num;
count = 1;
}
}
Integer[] arr = new Integer[count];
for(int j = 0 ; j<arr.length ; j++) arr[j] = a;
listOfArrays.add(arr);

The required output arrays are collected in a list - listOfArrays.

Hope that helps

 

[javabudy]

There is nothing available in API as per your need. as nupur suggested you need to write your own routine. you can also leverage no duplication feature of Set to achieve same thing

Javin