相关考题

单项选择题 public static void main(String[] args) {  try {  args=null;  args[0] = “test”;  System.out.println(args[0]);  } catch (Exception ex) {  System.out.println(”Exception”);  } catch (NullPointerException npe) {  System.out.println(”NullPointerException”);  }  }  What is the result?()

单项选择题 1.publicclassa{ 2.publicvoidmethod1(){ 3.try{ 4.Bb=newb(); 5.b.method2(); 6.//morecodehere 7.}catch(TestExceptionte){ 8.thrownewRuntimeException(te); 9.} 10.} 11.} 1.publicclassb{ 2.publicvoidmethod2()throwsTestException{ 3.//morecodehere 4.} 5.} 1.publicclassTestExceptionextendsException{ 2.} Given: 31.publicvoidmethod(){ 32.Aa=newa(); 33.a.method1(); 34.} WhichistrueifaTestExceptionisthrownonline3ofclassb?()

多项选择题 1. public class A {  2. public void method1() {  3. B b=new B();  4. b.method2();  5. // more code here  6. }  7. }  1. public class B {  2. public void method2() {  3.C c=new C();  4. c.method3();  5. // more code here  6. }  7. }  1. public class C {  2. public void method3() {  3. // more code here  4. }  5. }  Given:  25. try {  26. A a=new A();  27. a.method1();  28. } catch (Exception e) {  29. System.out.print(”an error occurred”);  30. }  Which two are true if a NullPointerException is thrown on line 3 of class C?()