java 方法复习

public static void main(String[] args){
        //方法
        //ff1  private
        ff1 m=new ff1();
        m.setBirth(2005);
        System.out.println(m.getAge1());
        m.getList("123", 18);
        System.out.println(m.getName()+","+m.getAge());
        
    }

       //方法1 ff1
class ff1{
   private String name;
   private int age;
   private int birth;

   public void setBirth(int birth) {
       this.birth = birth;
   }
   // private方法:
   private int calcAge(int currentYear) {
       return currentYear - this.birth;
   }
   public String getName() {
       return this.name;
   }
   public void setName(String name) {
       if(name==null || name.isEmpty()) {
           throw new IllegalArgumentException("报错");
       }   
       this.name = name;
   }
   public int getAge1() {
        return calcAge(2019); // 调用private方法
   }
   public int getAge(){
       return this.age;
   }
   public void setAge(int age) {
       this.age = age;
   }
   public void getList(String name,int age){
       if(name==null || name.isEmpty() || String.valueOf(age).equals("")){
           throw new IllegalArgumentException("报错");
       }   
       this.name=name;
       this.age=age;
   }
}

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