子类的父类和接口具有共同的方法

package com.study;
import lombok.Data;
@Data
public class FatherTest { 
    private String childen;
    private String son;
    private String test;
    public String getTest() {
        System.out.println("test");
        return test;
    }
    public void setTest(String test) {
        this.test = test;
    } 
}

package com.study;
public interface InterfaceTest {
    String getChilden();
    
    String getSon();
}

package com.study;
public class SonTest extends FatherTest implements InterfaceTest{
    public static void main(String[] args) {
        SonTest son = new SonTest();
        son.getTest();
    }
}