Changing value in one array changes value in another array

Question

I have really strange problem. In activity I declare two arrays

private String original[] = new String[100];
private String changed[] = new String[100];

Then I assign values to those two arrays in OnCreate:

Bundle extras = getIntent().getExtras();

if (extras != null) {
      original = extras.getStringArray("sentArray");

      changed = original;
}

Now if I change values of members of changed array, original array will also have that members changed.

For example, after I do

changed[0] = "New value";

value of original[0] is also "New value".

How is something like that possible? Is this a bug?

Answer 1

 changed = original;

This line is setting 'changed' to 'original' so they're the same array with the same pointers. You need to copy the array instead of setting changed equal to original.

You can try using System.arraycopy()