3.对象数组做参数

//学生类
public class Student {
    //属性
    public String name;//姓名
    public int score;
    
    //方法
    public void showInfo(){
        System.out.println(name+"的成绩是："+score);
    }
}

public class ModifyScore {
    //修改学员成绩，少于60的提高2分
    public void modifyScore(Student[] stus){
        for(int i=0;i<stus.length;i++){
            if(stus[i].score<60){
                stus[i].score+=2;
            }
        }
    }
    
    //输出学员信息
    public void showInfo(Student[] stus){
        for(Student stu:stus){
            stu.showInfo();
        }
    }

    public static void main(String[] args) {
        ModifyScore ms=new ModifyScore();
        Student[] stus=new Student[3];
        Student s1=new Student();
        s1.name="张三";
        s1.score=40;
        Student s2=new Student();
        s2.name="李四";
        s2.score=90;
        Student s3=new Student();
        s3.name="王五";
        s3.score=43;
        stus[0]=s1;
        stus[1]=s2;
        stus[2]=s3;
        
        ms.modifyScore(stus);
        ms.showInfo(stus);
    }

}