java - 访问器方法的使用

Question

这是我的类，包含 setter 和 getter

package Pack;

public class Details {

String FirstName,LastName,City,Country;

    public Details(String firstName, String lastName, String city,
            String country) {
        super();
        FirstName = firstName;
        LastName = lastName;
        City = city;
        Country = country;
    }

    public String getFirstName() {
        return FirstName;
    }

    public void setFirstName(String firstName) {
        FirstName = firstName;
    }

    public String getLastName() {
        return LastName;
    }

    public void setLastName(String lastName) {
        LastName = lastName;
    }

    public String getCity() {
        return City;
    }

    public void setCity(String city) {
        City = city;
    }

    public String getCountry() {
        return Country;
    }

    public void setCountry(String country) {
        Country = country;
    }
}

================================================== =============================

这是我的 main()

package Pack;

public class MainClass {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Details d = new Details("Hari","L","Bangalore","India");

    }

}

================================================== ===========================

我知道我的 main() 不完整。我应该写什么来显示“d”的内容？

Answer 1

有两种方法。

一，只需打印详细信息对象的每个属性:

System.out.println("FirstName :"+d.getFirstName()); 等等..

或者，更好的选择是重写类中的 toString() 方法

public void toString() {
        return this.getFirstName()+ " " + this.getLastName()+" "+.... ;
}

然后打印你的类System.out.println(d);