java interface接口的传值方法

A 类

package interface_test;

public class A {
   private IPresenter ip;
   public A(IPresenter ip) {
       this.ip = ip;
       set();
   }
   
   public void set() {
       ip.codeMsg("A class");
   }
   
}

interface 接口

package interface_test;

public interface IPresenter {
    void codeMsg(String str);
}

test 类

package interface_test;

public class test implements IPresenter {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
             new A(new test());
    }

    @Override
    public void codeMsg(String str) {
        // TODO Auto-generated method stub
        System.out.println(str);
    }

}