int [] a1 = new int[3];
int [] a2 = new int[4];
int [][] a3 = new int[2][3];
String [] a4 = new String[3];
System.out.println(a1.getClass()==a2.getClass());
//System.out.println(a1.getClass()==a4.getClass());
//System.out.println(a1.getClass()==a3.getClass());
System.out.println(a1.getClass().getName());