I am working on a String.
e.g of string - Cam01,Cam02,Cam03
Actually I want to split the string using , and add to the String array of length 4.
since there are only 3 items , the last item must be added as string "False".
When i created String arr[] = s.split(","); it creates an array of 3 items.
So last item i need to add as string "False" and make it array with length 4.
You can do this
String str = "Cam01,Cam02,Cam03";
str+= ",False";
String[] arr = str.split(",");
now in your String array arr you have...
arr[0]=Cam01 arr[1]=Cam02 arr[2]=Cam03 arr[3]=False
If you want to have an "Array" of variable size, I suggest using an ArrayList instead, where you can simply add things:
List<String> myArrayList = new ArrayList<String>( Arrays.toList( arr ) );
This way you will create a new ArrayList on which you can call "add":
while (myArrayList.size < 4)
myArrayList.add("False");
}
If you really need an array later, you can call myArrayList.toArray( new String[4] );. But often it is better to work with Collections/Lists anyway.
The array created with the split function is an array of three elements.
It is not possible to change the size of an array once it is created.
So what you can do is create a new array of size 4. Copy all elements of the first array in this new array and set the value of fourth element of the new array to "false".
If you need to do that here is the code:
String[] splittedArray = s.split(",");
String[] newArray = new String[4]; // OR any size you like
System.arraycopy(splittedArray, 0, newArray, 0, splittedArray.length);
Arrays.fill(newArray, splittedArray.length, newArray.length, "False");
The newArray is the array of size four you are searching.
Note that the size of newArray must be greater then the size of the splittedArray.
You could do it like this with an buffer String array
String arr[] = new String[4];
String buffer[];
String string = "Cam01,Cam02,Cam03";
buffer = string.split(",");
// Forgot the copy...
System.arraycopy(buffer, 0, arr, 0, buffer.length);
for(int i = buffer.length;i<arr.length;++i) {
arr[i] = "False";
}
Arrays.copyOf()...