无法将 int 转换为字符串数组

Question

Hi the problem in the code is at the end finalResult[index]= mark; code, mark gives error. It says cannot convert int to string. How can i fix it?

    System.out.println("Please choose a criteria (2-7) ?");
    topic = in.nextInt();
    System.out.println("Please enter a mark :");
    int mark = in.nextInt();
    final int size = cols.length;
    String[] finalResult = new String[size];
    int index = 0;

    while(index<finalResult.length ) {
        if (index==topic) {
          finalResult[index]= mark;
        } else {
        finalResult[index]=cols[index];
        }
        index++; 

    }
    }

Answer 1

The problem is here:

finalResult[index] = mark;

You can't put int number to String array :

Error:
incompatible types: int cannot be converted to java.lang.String

You need to convert number to String before adding to the array .

You have to change as follows:

finalResult[index] = String.valueOf(mark);

or

finalResult[index] = mark + "";

Answer 2

Casting integer to string is done with method String.valueOf so in your case it would be

String.valueOf(mark)

Answer 3

Change the mark declaration in the code as below,

String mark = in.nextLine();