成员变量私有的标准代码

Student.java

/*
 * 学生类
 */
public class Student {
	private String name;
	private int age;
	public void setName(String a)
	{
		name=a;
	}
	public String  getName()
	{
		return name;
	}
	public void setAge(int b)
	{
		age=b;
	}
	public int getAge()
	{
		return age;
	}
	
	

}

StudentDemo.java

public class StudentDemo {
    public static void main(String[] args) {
        //使用Student.java
        //创建对象
        Student s=new Student();
        System.out.println(s.getAge()+s.getName());
        s.setAge(30);
        s.setName("林依晨");
        System.out.println(s.getAge()+s.getName());
    }

}