3、定义一个表示学生信息的类Student，要求如下： （1）类Student的成员变量： sNO 表示学号；sName表示姓名；sSex表示性别；sAge表示年龄；sJava：表示Java课程成绩。 （2）类Student带参数的构造方法： 在构造方法中通过形参完成对成员变量的赋值操作。 （3）类Student的方法成员： l getNo（）：获得学号； l getName（）：获得姓名； l getSex（）：获得性别； l getAge（）获得年龄； l getJava（）：获得Java 课程成绩 根据类Student的定义，创建五个该类的对象，输出每个学生的信息，计算并输出这五个学生Java语言成绩的平均值，以及计算并输出他们Java语言成绩的最大值和最小值。

代码如下：

public class Student {
    private String sNO;
    private String sName;
    private String sSex;
    private int sAge;
    private double sJava;
    
    public Student(String sNO, String sName, String sSex, int sAge, double sJava) {
        this.sNO = sNO;
        this.sName = sName;
        this.sSex = sSex;
        this.sAge = sAge;
        this.sJava = sJava;
    }
    
    public String lgetNo() {
        return sNO;
    }
    
    public String lgetName() {
        return sName;
    }
    
    public String lgetSex() {
        return sSex;
    }
    
    public int lgetAge() {
        return sAge;
    }
    
    public double lgetJava() {
        return sJava;
    }
}

public class Main {
    public static void main(String[] args) {
        Student s1 = new Student("001", "张三", "男", 20, 89.5);
        Student s2 = new Student("002", "李四", "女", 19, 92.0);
        Student s3 = new Student("003", "王五", "男", 21, 85.5);
        Student s4 = new Student("004", "赵六", "女", 20, 90.5);
        Student s5 = new Student("005", "周七", "男", 22, 88.0);
        
        System.out.println("学生信息：");
        System.out.println(s1.lgetNo() + " " + s1.lgetName() + " " + s1.lgetSex() + " " + s1.lgetAge() + " " + s1.lgetJava());
        System.out.println(s2.lgetNo() + " " + s2.lgetName() + " " + s2.lgetSex() + " " + s2.lgetAge() + " " + s2.lgetJava());
        System.out.println(s3.lgetNo() + " " + s3.lgetName() + " " + s3.lgetSex() + " " + s3.lgetAge() + " " + s3.lgetJava());
        System.out.println(s4.lgetNo() + " " + s4.lgetName() + " " + s4.lgetSex() + " " + s4.lgetAge() + " " + s4.lgetJava());
        System.out.println(s5.lgetNo() + " " + s5.lgetName() + " " + s5.lgetSex() + " " + s5.lgetAge() + " " + s5.lgetJava());
        
        double sum = s1.lgetJava() + s2.lgetJava() + s3.lgetJava() + s4.lgetJava() + s5.lgetJava();
        double avg = sum / 5;
        System.out.println("Java语言成绩平均值：" + avg);
        
        double max = s1.lgetJava();
        if (s2.lgetJava() > max) {
            max = s2.lgetJava();
        }
        if (s3.lgetJava() > max) {
            max = s3.lgetJava();
        }
        if (s4.lgetJava() > max) {
            max = s4.lgetJava();
        }
        if (s5.lgetJava() > max) {
            max = s5.lgetJava();
        }
        System.out.println("Java语言成绩最大值：" + max);
        
        double min = s1.lgetJava();
        if (s2.lgetJava() < min) {
            min = s2.lgetJava();
        }
        if (s3.lgetJava() < min) {
            min = s3.lgetJava();
        }
        if (s4.lgetJava() < min) {
            min = s4.lgetJava();
        }
        if (s5.lgetJava() < min) {
            min = s5.lgetJava();
        }
        System.out.println("Java语言成绩最小值：" + min);
    }
}