Converting a String array into an int Array in java

user_389376 0
Viewed 204929

I am new to java programming. My question is this I have a String array but when I am trying to convert it to an int array I keep getting

java.lang.NumberFormatException

My code is 

private void processLine(String[] strings) {
    Integer[] intarray=new Integer[strings.length];
    int i=0;
    for(String str:strings){
        intarray[i]=Integer.parseInt(str);//Exception in this line
        i++;
    }
}

Any help would be great thanks!!!

java
9 Answers

Another short way:

int[] myIntArray = Arrays.stream(myStringArray).mapToInt(Integer::parseInt).toArray();
user_77152500

Since you are trying to get an Integer[] array you could use:

Integer[] intarray = Stream.of(strings).mapToInt(Integer::parseInt).boxed().toArray(Integer[]::new);

Your code:

private void processLine(String[] strings) {
    Integer[] intarray = Stream.of(strings).mapToInt(Integer::parseInt).boxed().toArray(Integer[]::new);
}

Note, that this only works for Java 8 and higher.

user_23430110
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