常量类是必不可少的东西,最常见的方法直接是这样:
public class Constants{
public static final String NOTNULL = "...";
}
后边读了《Thinking in java》,升级成这样:
public interface Constants{
String NOTNULL = "...";
}
然后继续读读…升级成这样:
public enum Constants {
//定义常量
NOTNULL("Required parameters is not be null or empty."),
NOTRESULT("There is no such data in database.");
//重写toString方法输出括号里的内容
private String constants;
Constants(String s){
this.constants = s;
}
@Override
public String toString() {
return constants;
}
}
emmmmmmm……
感觉牛逼了许多。