How to convert an int array to String with toString method in Java [duplicate]
What you want is the Arrays.toString(int[])
method:
import java.util.Arrays;int[] array = new int[lnr.getLineNumber() + 1];int i = 0;.. System.out.println(Arrays.toString(array));
There is a static Arrays.toString
helper method for every different primitive java type; the one for int[]
says this:
public static String toString(int[] a)
Returns a string representation of the contents of the specified array. The string representation consists of a list of the array's elements, enclosed in square brackets (
"[]"
). Adjacent elements are separated by the characters", "
(a comma followed by a space). Elements are converted to strings as byString.valueOf(int)
. Returns"null"
ifa
is null.
Very much agreed with @Patrik M, but the thing with Arrays.toString is that it includes "[" and "]" and "," in the output. So I'll simply use a regex to remove them from outout like this
String strOfInts = Arrays.toString(intArray).replaceAll("\\[|\\]|,|\\s", "");
and now you have a String which can be parsed back to java.lang.Number
, for example,
long veryLongNumber = Long.parseLong(intStr);
Or you can use the java 8 streams, if you hate regex,
String strOfInts = Arrays .stream(intArray) .mapToObj(String::valueOf) .reduce((a, b) -> a.concat(",").concat(b)) .get();