int a = 10;

if ( a <= 0 )
System.out.println("A");
if (a > 10)
System.out.println("B");
else
System.out.println("C");
switch (a) {
case 0x10:
System.out.println("D"); break;
case 0xA:
break;
default:
System.out.println("E");
}