我需要创建接口MultiLingual,它允许以不同的语言显示对象的数据(不是数据本身,而是像“作者”,“标题”等介绍)。使用Java接口
打印的数据是这样的:
3 grudnia 1998
10th of June 1924
Autor: Tolkien
Tytul: LoTR
Wydawnictwo: Amazon 2010
Author: Mitch Albom
Title: Tuesdays with Morrie
Publishing House: Time Warner Books 2003
37 360,45 PLN
5,850.70 GBP
3rd of December 1998
10th of June 1924
Author: Tolkien
Title: LoTR
Publishing House: Amazon 2010
Author: Mitch Albom
Title: Tuesdays with Morrie
Publishing House: Time Warner Books 2003
37,360.45 GBP
5,850.70 GBP
测试代码如下所示:
public class Main {
public static void main(String[] args){
MultiLingual gatecrasher[]={ new Data(3,12,1998),
new Data(10,6,1924,MultiLingual.ENG),
new Book("LoTR", "Tolkien", "Amazon", 2010),
new Book("Tuesdays with Morrie",
"Mitch Albom", "Time Warner Books",2003,
MultiLingual.ENG),
new Money(1232895/33.0,MultiLingual.PL),
new Money(134566/23.0,MultiLingual.ENG),
};
for(int i=0;i < gatecrasher.length;i++)
System.out.println(gatecrasher[i]+"\n");
for(int i=0;i < gatecrasher.length;i++)
System.out.println(gatecrasher[i].get(MultiLingual.ENG)+"\n");
}
}
,所以我需要引进常数ENG,PL在多语言界面,以及GET方法(INT语言):
public interface MultiLingual {
int ENG = 0;
int PL= 1;
String get(int lang);
}
然后我有班书。问题始于构造函数。其中之一需要以MultiLingual.ENG作为参数,但如何实现呢?这是正确的方式吗? :
class Book implements MultiLingual {
private String title;
private String publisher;
private String author;
public Book(String t, String a, String p, int y, MultiLingual lang){
}
或者我应该把这个MultiLingual.ENG当作int变量来处理,它会自动改变接口中的常量吗?
的书并不需要MultLingual作为参数,但下面的实现第二个构造函数是有点不对:
public Book(String t, String a, String p, int y){
Book someBook = new Book(t, a, p, y, MultiLingual m);
}
我可以只发送INT米处的多语种米,但我将有语言,如果没有控制设置为PL或ENG。
终于搞定了()的方法Boook,但我认为至少这应该做工精细:
public String get(int lang){
String data;
if (lang == ENG){
data = "Author: "+this.author+"\n"+
"Title: "+this.title+"\n"+
"Publisher: "+this.publisher+"\n";
}
else {
data = "Autor: "+this.author+"\n"+
"Tytul: "+this.title+"\n"+
"Wydawca: "+this.publisher+"\n";
}
return data;
}
@Override
public String toString(){
return "";
}
}
谢谢,现在我得到它 – 2010-03-28 22:35:12