Splitting a String array and storing in a list

Question

There is a string[] arr = {"aa-bb-cc","dd-bb-ee","aa-hh-gg"} which needs to be split on the basis of , and -. The values aa,dd,aa should be stored in one list whereas bb,hh in another list. I have written this code snippet:

String[] arr = {"aa-bb-cc","dd-bb-ee","aa-hh-gg"};      
for(int i=0;i<arr.length;i++){          
    newArr =  arr[i].split(",");            
    for(int j=0;j<newArr.length;j++){               
    resultArr = newArr[j].split("-");                                                
    appList.add(resultArr[0]);               
    prodList.add(resultArr[1]);                 
    rolList.add(rresultArr[2]ol);        
}

Above approach could be better if we do arr[i].split in another way so that we can run only one loop but I could not achieve that so far.

I wanted to know is there any best way to achieve the requirement.

Splitting by , wont do much, since here it seperates the elements in the array... — SomeJavaGuy
– SomeJavaGuy, Commented Nov 5, 2015 at 7:14
@Harleen: considering that you are new on SO, whichever answer helped you solve your problem, you should mark it as correct. — Sarthak Mittal
– Sarthak Mittal, Commented Nov 5, 2015 at 7:28
What could be the best way to avoid ArrayIndexOutOfBoundException if say newArr[1] or newArr[2] is not available. I can very well handle in catch but I want the better way that there would be less chances to get such runtime exceptions. — Harleen
– Harleen, Commented Nov 6, 2015 at 11:48
@Harleen you can loop the array through its length, but then you will either have to use if-else or switch-case inside your loop, so it is better that you create an array of ArrayList which would contain appList, prodList and rolList and access them with the loop index... — Sarthak Mittal
– Sarthak Mittal, Commented Nov 6, 2015 at 12:53

Sarthak Mittal · Accepted Answer · 2015-11-05 07:21:40Z

3

You don't need to split it using , ,since it's not part of the String but part of the String array declaration syntax,just split it with a -

String[] arr = {"aa-bb-cc","dd-bb-ee","aa-hh-gg"};      
for(int i=0;i<arr.length;i++){          
newArr =  arr[i].split("-");                                                            
appList.add(newArr[0]);               
prodList.add(newArr[1]);                 
rolList.add(newArr[2]);        
}

edited Nov 5, 2015 at 7:21

answered Nov 5, 2015 at 7:14

Sarthak Mittal

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1 Comment

TheLostMind Over a year ago

Ya. This is the way to go

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