单选题public class Test {  public static void add3 (Integer i) {  int val = i.intValue();  val += 3;  i = new Integer(val); }  public static void main(String args[]) {  Integer i = new Integer(0);  add3(i);  System.out.println(i.intValue());  }  }   What is the result? ()A 0B 3C Compilation fails.D An exception is thrown at runtime.

单选题
public class Test {  public static void add3 (Integer i) {  int val = i.intValue();  val += 3;  i = new Integer(val); }  public static void main(String args[]) {  Integer i = new Integer(0);  add3(i);  System.out.println(i.intValue());  }  }   What is the result? ()
A

 0

B

 3

C

 Compilation fails.

D

 An exception is thrown at runtime.


参考解析

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