java封装

public class teacherDemo {

	public static void main(String []args) {
		String name = "张三";
		int age = 25;
		teacher tea = new teacher();
		tea.setName(name);
		tea.setAge(age);
		System.out.println(tea.getAge());
		System.out.println(tea.getName());
		
	}
}

class teacher{
	private String name;
	private int age;
	
	//属性
	public String getName() {
		return name;
	}
	public void setName(String sName) {
		name = sName;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int sAge) {
		if(sAge<22) {
			System.out.println("错误，教师年龄不能小于22岁");
			sAge = 22;
		}else {
			age = sAge;
		}
	}
	
}