Number n1=new Number(; Number n2=new NumberO; n1.i=47: n2.i=13; System.out.println("nl.i="+nl.i+"n2.i="+n2.i); n1=n2: System.out.println("n1.i="+n1.i+"n2.i="+n2.i); } 2)程序的输出结果是 public class DigitK{ public static void main(String[]args){ long a=73892465; System.out.println(digit(a,3)); static int digit(long n,int k){ for(int i=0;i<k;i++) n/=10: return(int)n%10; } 3)程序输出结果是Number n1=new Number(); Number n2=new Number(); n1.i=47; n2.i=13; System.out.println(“n1.i=”+n1.i+”n2.i=”+n2.i); n1=n2; System.out.println(“n1.i=”+n1.i+”n2.i=”+n2.i); } } 2) 程序的输出结果是 public class DigitK{ public static void main(String[] args){ long a=73892465; System.out.println(digit(a,3)); } static int digit(long n, int k){ for(int i=0;i<k;i++) n/=10; return (int)n%10; } } 3）程序输出结果是