How does the values of an array changes when we passed it as an argument to other function?

When i passed an array as an argument to the function, the original array gets changed, but the array should not get changed right? please correct me if am wrong.

below i passed an int x=10 as an argument to change(int a) function. the value of the original int x got changed.

So how does the same code affects an array and int in different way?

public  class Runy  {

public static void main(String [] args) 
{
    Runy p = new Runy();
    p.start();
}

void start() 
{
    long [] a1 = {3,4,5};
    long [] a2 = fix(a1);

    int x=10;
    int y= change(x);

    System.out.println(y);
    System.out.println(x);

    System.out.print(a1[0] + a1[1] + a1[2] + " ");
    System.out.println(a2[0] + a2[1] + a2[2]);

}

long [] fix(long [] a3) 
{
    a3[1] = 7;
    return a3;
}
int change(int a)
{
    a=a+1;
    return a;
}

}