Enum初体验

感觉Enum真的与内部类有异曲同工之妙。

public class TestEnum
{
    /**
     * <一句话功能简述> <功能详细描述>
     *
     * @param args [参数说明]
     * @return void [返回类型说明]
     * @exception throws [违例类型] [违例说明]
     * @see [类、类#方法、类#成员]
     */
    public static void main(String[] args)
    {
        OperationSystem oSystem;
        oSystem = OperationSystem.chrom;
        oSystem = OperationSystem.unix;
        System.gc();
        // Runtime.getRuntime().gc();// 通知JVM进行手动垃圾清理机制
        String key = "123";
        switch (oSystem)
        {
            case chrom:
                System.out.println("Google");
                break;
            case widows:
                System.out.println("Microsoft");
                break;
            case linux:
                System.out.println("RedHat");
                break;
            case unix:
                System.out.println("Apple");
                break;
        }
    }
}

 

public enum OperationSystem
{
    widows, unix, suse, linux, chrom;
}