如何在Java中将基本类型的数组作为对象数组传递？

Question

I wanted the following function to be generic for all data types. However, this does not work with the primitive data types. Why is that? Can anyone give a solution to this? I would greatly appreciate it.

private int getIndexOfElement(Object x, Object[] xArray){
        for(int i=0; i<xArray.length;i++){
            if(xArray[i]==x){
                return i;
            }
        }
        return  -1;
    }

Answer 1

Your method getIndexOfElement(int,Object[]) accepts any array of type, that extends Object . Since int is primitive type - not a class type, you can not pass int[] to the method. However, you can use Integer class:

    Integer[] ints = new Integer[]{1,2,3,4,5};
    Integer i = 5;
    int index = getIndexOfElement(i, ints);