用java写一个person类对象是学生姓名年龄班级

可以这样写：

public class Person {
    private String name;
    private int age;
    private String className;
    
    public Person(String name, int age, String className) {
        this.name = name;
        this.age = age;
        this.className = className;
    }
    
    // Getter and setter methods
    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public int getAge() {
        return age;
    }
    
    public void setAge(int age) {
        this.age = age;
    }
    
    public String getClassName() {
        return className;
    }
    
    public void setClassName(String className) {
        this.className = className;
    }
}

使用方法：

Person student = new Person("张三", 18, "一班");
System.out.println("学生姓名：" + student.getName());
System.out.println("学生年龄：" + student.getAge());
System.out.println("学生班级：" + student.getClassName());