●プログラム・リスト●

※SampleBeanInterfaceインターフェイス

package com.tuyano.libro;

public interface SampleBeanInterface {
    public String getMessage();
    public void setMessage(String message);
}

※SampleBeanクラス

package com.tuyano.libro;

public class SampleBean implements SampleBeanInterface {
    private String message;
    
    public SampleBean() {
        message = "(no message)";
    }
    
    public SampleBean(String message) {
        this.message = message;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    @Override
    public String toString() {
        return "SampleBean [message=" + message + "]";
    }
}