java的应用貌似在数据和网络方面比较多,学习过程中遇到的问题也经常与数据管理方面有关。这里有简单的成绩管理应用,非图形界面。
class Student{
private String name;
private String ID;
private double[] score;
public Student(String name, String ID){
this.name = name;
this.ID = ID;
}
public String getName(){
return name;
}
public String getID(){
return ID;
}
public boolean setScore(double fenshu[]){ //判断当分数的输入是合理时,对数组赋值
boolean set = true;
score = new double[fenshu.length];
for(int i = 0; i < fenshu.length; i++){
if(fenshu[i] < 0 || fenshu[i] > 100){
set = false;
}else{
score[i] = fenshu[i];
}
}
return set;
}
public double[] getScore(){
return score;
}
public double sum(){ //求总分
double sum = 0;
for(int i = 0; i < score.length; i++){
sum += score[i];
}
return sum;
}
public double average(){ //求平均分
double average = this.sum() / score.length;
return average;
}
public double[] max_min(){ //求最高分和最低分
double[] max_min = new double[2];
max_min[0] = 0;
max_min[1] = score[0];
for(int i = 0; i < score.length; i++){
if(score[i] > max_min[0]){
max_min[0] = score[i];
}
if(score[i] < max_min[1]){
max_min[1] = score[i];
}
}
return max_min;
}
public void prinf(){
System.out.println(name + ID +"成绩的总分是:" + this.sum());
System.out.println(" 成绩的平均分是: " + this.average());
System.out.println(" 最高分是:"+ this.max_min()[0]);
System.out.println(" 最低分是:"+ this.max_min()[1]);
}
}
public class Test{
public static void main(String[] args){
Student std = new Student("张三", "201607");
double[] fenshu ={56, 77, 89};
if(std.setScore(fenshu))
std.prinf();
}
}