初学者，求教。

[xue333yuan]

定义一个表示学生的类，类包括表示学生的学号，姓名，性别，年龄和3门课程成绩的信息数据及用来获得和设置学号，姓名 性别 年龄和3门课程成绩的方法。创建TESTSTudent，生成5个学生对象，计算3门课程的平均成绩，以及某门课程的最高分和最低分。


求教怎么定义 3门课程的最高分最低分的方法。

[xue333yuan]

不是求某学生的3门成绩的最高和最低。
是求5个学生中的最高和最低。
貌似用数组去求。
弄不明白。高手出现吧。

[安特矮油]

以后这种问题自己多想想吧。

package com.study;


public class Student {

	private int no;
	private String name;
	private String sex;
	private int age;
	private double score1;
	private double score2;
	private double score3;

	public double getAvgScore(){
		return score1*score2*score3/3;
	}
	
	public Student(int no, String name, String sex, int age, double score1,
			double score2, double score3) {
		super();
		this.no = no;
		this.name = name;
		this.sex = sex;
		this.age = age;
		this.score1 = score1;
		this.score2 = score2;
		this.score3 = score3;
	}
	public int getNo() {
		return no;
	}
	public void setNo(int no) {
		this.no = no;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public double getScore1() {
		return score1;
	}
	public void setScore1(double score1) {
		this.score1 = score1;
	}
	public double getScore2() {
		return score2;
	}
	public void setScore2(double score2) {
		this.score2 = score2;
	}
	public double getScore3() {
		return score3;
	}
	public void setScore3(double score3) {
		this.score3 = score3;
	}
	
}



package com.study;


public class Test {
	public static void main(String[] args) {
		Student s1 = new Student(1,"张1","男",11,80,80,80);
		Student s2 = new Student(2,"张2","男",12,78,66,90);
		Student s3 = new Student(3,"张3","男",11,55,44,50);
		Student s4 = new Student(4,"张4","男",13,88,92,99);
		Student s5 = new Student(5,"张5","男",11,75,86,22);
		Student[] ss = new Student[]{s1,s2,s3,s4,s5};
		System.out.println("===========================================");
		double maxScore1 = -1;
		double maxScore2 = -1;
		double maxScore3 = -1;
		double minScore1 = Double.MAX_VALUE;
		double minScore2 = Double.MAX_VALUE;
		double minScore3 = Double.MAX_VALUE;
		for(Student s : ss){
			System.out.println(s.getName() + "的平均成绩为：" + s.getAvgScore());
			if(maxScore1 <= s.getScore1()){
				maxScore1 = s.getScore1();
			}
			if(minScore1 >= s.getScore1()){
				minScore1 = s.getScore1();
			}
			
			if(maxScore2 <= s.getScore2()){
				maxScore2 = s.getScore2();
			}
			if(minScore2 >= s.getScore2()){
				minScore2 = s.getScore2();
			}
			
			if(maxScore3 <= s.getScore3()){
				maxScore3 = s.getScore3();
			}
			if(minScore3 >= s.getScore3()){
				minScore3 = s.getScore3();
			}
		}
		System.out.println("===========================================");
		System.out.println("score1最高分为：" + maxScore1);
		System.out.println("score2最高分为：" + maxScore2);
		System.out.println("score3最高分为：" + maxScore3);
		System.out.println("===========================================");
		System.out.println("score1最低分为：" + minScore1);
		System.out.println("score2最低分为：" + minScore2);
		System.out.println("score3最低分为：" + minScore3);
	}
}

[dryZeng]

你是想用代码还是想用sql语句？