Java基础编程题目——编写一个学生类student

﹏ヽ暗。殇╰゛Y 2023-07-17 12:39 34阅读 0赞

**编写一个学生类student，包含的属性有学号、姓名、年龄、将所有的学生存储在一个数组中，自拟数据，用数组的初始化方法给数组赋值。并实现如下操作：**  
**1.将所有学生年龄增加一岁**  
**2.按数组顺序显示所有学生信息**  
**3.查找显示所有年龄大于20的学生名单**

public class Students {
        
        public static void main(String[] args) {
        
        student[] date = new student[3];
        date[0] = new student(1, "ling", 19);
        date[1] = new student(2, "hui", 20);
        date[2] = new student(3, "he", 21);
    
        for(int i = 0; i < date.length; i++) //打印初始信息
            date[i].print();
        System.out.println();
    
        for(int i = 0; i < date.length; i++) //年龄加一
            date[i].age++;
    
        for(int i = 0; i < date.length; i++) //打印年龄加一后的信息
            date[i].print();
        System.out.println();
    
        for(int i = 0; i < date.length; i++) //打印20岁以上的信息
            if(date[i].age > 20)
                date[i].print();
        }
    }
    
    class student {
        
        int num;
        String name;
        int age;
        public student(int num, String name, int age) {
        
            this.num = num;
            this.name = name;
            this.age = age;
        }
    
        public void print() {
        
            System.out.println("num:" + this.num +
                                " name:" + this.name +
                                " age:" + this.age);
        }
    }