Public class Student {

Private String name;

Public void setName(String name)

This.name = name;

}

Public String getName() {

Return name;

}

}

Public class Student() {

Private String name;

Public void setName(String name) {

This.name = name;

}

Public String getName() {

Return name;

}

}

在Course类的方法中,下列选项能够正确地为属性name进行赋值的是( )

Public class GrandFather {

Public GrandFather(String s){

System.out.println("grandfather");

}

}

Class Father extends GrandFather {

Father(){

System.out.println("father");

}

}

Class Son extends Father{

Public static void main(String[] args)

Son son= new Son();

}

}

public class Pet{

 protected int age;

 protected void run(){

  System.out.println("run!");

 }

}

class Dog extends Pet{

 public void run(){

  System.out.println("A Dog is running!");

 }

 public void walk(){

  System.out.println("A Dog is running!");

 }

}

class Test{

 public static void main(String[] args){

  Pet pet = new Dog();   

  pet.walk();

 }

}

Class Person {

Public void show( ){

System.out.println("人类!");

}

}

Class Student extends Person{

Public void study( ){

System.out.println("学习!");

}

}

Class Doctor extends Person {

Public void show( ){

System.out.println("医生!");

}

}

Class Test {

Public static void main(String[] args){

Person student = new Doctor( );

Person doctor = new Doctor( );

((Student) student).study( );

Doctor.show( );

}

}

Interface Mylnterface {

Int j= 0;

}

Public class Test implements Mylnterface{

Public static void main(String[] args){

Int i;

Test test = new Test( );

I=test.j;//①

I= Test.j;//②

I=Mylnterface.j;//③

}

}

public interface A{

int x = 0;

}

class B{

int x=1;

}

class C extends B implements A{

public void px(){

System.out.printin(super.x);

}

public static void main(string[] args)(

new C( ).px( );

}

}

Public class Test {

Public static void main(String[] args){

New Test( ).test( );

}

Public void test( ){

Try{

System.out.print("try");

} catch (ArrayIndexOutOfBoundsException e){

System.out.print("catch1");

} catch (Exception e){

System.out.print("catch2");

}finally{

System.out.println("finally");

}

}

}

Public class Test{

Public static void foo(){

Try {

String s = null;

S = s.toLowerCase();

} catch(NullPointerException e){

System.out.print("2");

} finally {

System.out.print("3");

}

System.out.print("4");

}

Public static void main(String args[]){

Foo();

}

}