黑馬學習---------------反射（執行其他類的main方法）

Test.java

package com.belmeng.test;

public class Test
{
	public enum WeekDay
	{
		SUN, MON, THE(2), WED, THU, FRI, SAT;
		private WeekDay()
		{
			System.out.println("first");
		}

		private WeekDay(int w)
		{
			System.out.println("second");
		}
	}

	public static void main(String[] args)
	{
		Integer a = 12;
		Integer b = 12;
		System.out.println(a == b);
		Integer x = 200;
		Integer y = 200;
		System.out.println(x == y);
		WeekDay week = WeekDay.SUN;
		System.out.println(week);
		System.out.println(week.ordinal());
		System.out.println(week.name());
		WeekDay day = WeekDay.valueOf("FRI");
		System.out.println(day.ordinal());
		for (WeekDay w : WeekDay.values())
		{
			System.out.println(w.name());
			System.out.println(w.ordinal());
		}
	}
}

TestMain.java

import java.lang.reflect.Method;

public class TestMain
{
	public static void main(String[] args) throws Exception
	{
		Class c = Class.forName(args[0]);
		Method main = c.getClass().getMethod("main", String[].class);
		main.invoke(null, (Object) new String[] { "abc" });
	}
}

執行參數:  com.belmeng.test.Test