On Java 7's equals() and deepEquals()

Question

Method description says:

Returns true if the arguments are deeply equal to each other and false otherwise... Equality is determined by using the equ

Answer 1

deepEquals() is used with nested arrays of arbitrary depth.
equals() is used with simple primitive data types.
For ex:

public class TwoDArray {
    public static void main(String args[]) {
        int a[][] = new int[2][2];
        int b[][] = new int[2][2];
        for(int i=0;i<2;i++)
            for(int j=0;j<2;j++) {
                a[i][j] = i+j;
                b[i][j] = i+j;  
            }
        System.out.println(Arrays.deepEquals(a,b));//return true
        System.out.println(Arrays.equals(a, b));//return false
    }
}