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Java 存储学生姓名和平均成绩的学生班级。

欢马劈雪

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创建和测试学生对象。

实例源码：

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public class Main
/**
 from
* NowJava.com 
**/

{

public static void main(String[] args)

{

Student account1 = new Student("James Bond", 93.5);

Student account2 = new Student("Michael Bates", 72.75);

System.out.printf("%s's letter grade is: %s%n",

account1.getName(), account1.getLetterGrade());

System.out.printf("%s's letter grade is: %s%n",

account2.getName(), account2.getLetterGrade());

}

class Student

{

private String name;

private double average; // from N o w  J a v a  .   c o m

// constructor initializes instance variables

public Student(String name, double average)

{

this.name = name;

// validate that average is > 0.0 and <= 100.0; otherwise,

// keep instance variable average's default value (0.0)

if (average > 0.0) {

if (average <= 100.0){

this.average = average; // assign to instance variable

}

// sets the Student's name

public void setName(String name)

{

this.name = name;

}

// retrieves the Student's name

public String getName()

{

return name;

}

// sets the Student's average

public void setAverage(double average)

{

// validate that average is > 0.0 and <= 100.0; otherwise,

// keep instance variable average's current value

if (average > 0.0) {

if (average <= 100.0){

this.average = average; // assign to instance variable

}

// retrieves the Student's average

public double getAverage()

{

return average;

}

// determines and returns the Student's letter grade

public String getLetterGrade()

{
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编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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