枚举Enum

http://blog.csdn.net/qq_27093465/article/details/52180865
https://www.cnblogs.com/hyl8218/p/5088287.html

枚举其实也可以看作是一个对象类，它里面也是有属性、构造方法的、方法体的；
package enumTest;

enum Car {
	现代,奔驰,宝马,大众
}

public class EnumTest {
	public static void main(String[] args) {
		Car car = Car.奔驰;
		switch(car){
		case 现代 :
		System.out.println("现代车");
		break;
		case 奔驰 :
		System.out.println("奔驰车");
		break;
		case 宝马 :
			System.out.println("宝马车");
			break;
		case 大众 :
			System.out.println("大众车");
			break;
		default :
			System.out.println("不知道是什么车");
			break;
		}
		
	}
}

　　

package enumTest;

public enum EnumTest01 {
	PERSONAL_AGENT("1", "aaa"), PART_AGENT("2", "ssss"), OFFICAL_AGENT("3",
			"cccc"), TRADITION_AGENT("4", "经济学"), COMPERATE_AGENT("6",
			"sxsx"), DIRECT_BUSINESS("D", "心理学"), XUEKE_LINCHAUNG("5","临床学");

	private String key;
	private String desc;

	private EnumTest01(String key, String desc) {
		this.key = key;
		this.desc = desc;
	}

	public static EnumTest01 getByKey(String key) {
		for (EnumTest01 bun : EnumTest01.values()) {
			if (bun.key.equals(key)) {
				return bun;
			}
		}
		throw new IllegalArgumentException("No element matches " + key);
	}

	public String getKey() {
		return key;
	}

	public void setKey(String key) {
		this.key = key;
	}

	public String getDesc() {
		return desc;
	}

	public void setDesc(String desc) {
		this.desc = desc;
	}

	public static void main(String[] args) {
		EnumTest01 bun = EnumTest01.getByKey("5");
		System.out.println("bun:" + bun.getDesc());
	}
}

　　

枚举类型的调用

/**
 * 调用enum方法，直接调用就可以
 *
 */
public class EnumDiaoYongTest {
	public static void main(String[] args) {
		//EnumTest xueke = new EnumTest();
		EnumTest xueke = EnumTest.getByKey("D");
		System.out.println(xueke.getDesc());
	}
}