初识enum

package cn.netjava.enumTest;
import static java.lang.System.out;
public class Demo1 {
	
	@org.junit.Test
	public void Test()
	{
		print(Grade.A);
	}
	public void print(Grade g)
	{
		out.println(g.juage());
	}
	@org.junit.Test
	public void Test1()
	{
		print1(Grade1.A);
	}
	public void print1(Grade1 g)
	{
		out.println(g.getValue());
	}

}
enum Grade
{
	A("5")
	{
		public String juage()
		{
			return "优";
		}
	},
	B("4")
		{
		public String juage()
		{
			return "良";
		}
	},
	C("3")
		{
		public String juage()
		{
			return "一般";
		}
	},
	D("2")
		{
		public String juage()
		{
			return "差";
		}
	},
	E("1")
		{
		public String juage()
		{
			return "不及格";
		}
	};
	private String value;
	private Grade(String value)
	{
		this.value=value;
	}
	public String getValue()
	{
		return this.value;
	}
	public abstract String juage();
}
class Grade1
{
	private String value;
	private Grade1(String value){
		this.value=value;
	}
	public static final Grade1  A=new Grade1("5");
	public static final Grade1  B=new Grade1("4");
	public static final Grade1  C=new Grade1("3");
	public static final Grade1  D=new Grade1("2");
	public static final Grade1  E=new Grade1("1");
	public String getValue()
	{
		return this.value;
	}
}

 jdk5之后的新特性，初步了解了枚举的特性，补充了一个java文件可以命名多个类的知识