Java中的枚举类型



1.用枚举方法实现颜色的判断与输出。

package chy;

public class TestJava {
	enum Color {
		RED, YELLOW, BLACK
	}

	public void showColor(Color c) {
		switch (c) {
		case RED:
			System.out.println("RED");
			break;
		case YELLOW:
			System.out.println("YELLOW");
			break;
		case BLACK:
			System.out.println("BLACK");
			break;
		default:
			System.out.println("color");
			break;
		}

	}

	public static void main(String[] args) {
		TestJava tj = new TestJava();
		tj.showColor(Color.RED);

	}

}


2.使用枚举方法中的构造方法。
package chy;

public class TestJava {
	enum Color {
		RED("red", 1), YELLOW("yellow", 2), BLACK("black", 3);
		String color;
		int in;

		Color(String color, int i) {
			this.color = color;
			this.in = i;
		}

		public String getColor() {
			return color;
		}

		public int getIndex() {
			return in;
		}
	}

	public static void main(String[] args) {
		System.out.println(Color.RED.getColor() + Color.RED.getIndex());

	}
}