请按照以下要求设计一个学生类Student，并进行测试。
要求如下：
1、Student类中包含姓名、成绩两个属性。
2、分别给这个属性设置两个方法，一个方法用于设置值，另一个方法用于获取值。
3、Student类中定义一个无参的构造方法和一个接收两个参数的构造方法，两个参数分别为姓名和成绩属性赋值。
4、在测试类中创建两个Student对象，一个使用无参的构造方法，然后调用方法给姓名和成绩赋值，另一个使用有参的构造方法，在构造方法中给姓名和成绩赋值。
法一：
class Student
{
private String name;
private double grade;
public Student(){
}
public Student(String name, double grade)
{
this.name = name;
this.grade = grade;
}
public String getName(){
return name;
}
public void setName(String name){
this.name = name;
}
public double getGrade()
{
return grade;
}
public void setGrade(double grade){
this.grade = grade;
}
}
public class Test00
{
public static void main(String[] args){
Student stu1 = new Student();
stu1.setName("王梅");
stu1.setGrade(100);
Student stu2 = new Student("丽华", 100);
System.out.println("学生"+stu1.getName()+"的成绩为"+stu1.getGrade()+"");
System.out.println("学生"+stu2.getName()+"的成绩为"+stu2.getGrade()+"");
}
}
法二：
class Student{
private String name;
private double grade;
Student(){}
Student(String name,double grade){
this.name=name;
this.grade=grade;
}
public String getName(){
return name;
}
public void setName(String name){
this.name=name;
}
public double getGrade(){
return grade;
}
public void setGrade(double grade){
this.grade=grade;
}
public void speak(){
System.out.println("学生姓名："+name+"，学生成绩："+grade+"！");
}
}
public class Test01{
public static void main(String[] args){
Student p1=new Student();
p1.setName("李华");
p1.setGrade(85.3);
p1.speak();
Student p2=new Student("孙华",92.1);
p2.speak();
}
}
法三：
class Student
{
private String xingming;
private int chengji;
public String getxingming(){
return xingming;
}
public void setxingming(String xingming){
this.xingming=xingming;
}
public int getchengji(){
return chengji;
}
public void setchengji(int chengji){
if(chengji<0){
System.out.println("!!!!!!!!!");
}
else{
this.chengji=chengji;}
}
public Student(){
}
public Student(String xingming,int chengji){
this.xingming=xingming;
this.chengji=chengji;
}
}
public class Test02{
public static void main(String[] args){
Student S1=new Student();
S1.setchengji(222);
S1.setxingming("sunjialei");
Student S2=new Student("mengnan",222);
//String a=S1.getxingming();
System.out.println(S1.getxingming());
System.out.println(S1.getchengji());
System.out.println(S2.getxingming());
System.out.println(S2.getchengji());
}
}
