Java之Default关键字的两种使用方式

		int day = 8;
		String dayString;
		switch (day) {
			case 1:	dayString = "Monday";
					break;
			case 2: dayString = "Tuesday";
					break;
			case 3: dayString = "Wednesday";
					break;
			case 4: dayString = "Thursday";
					break;
			case 5: dayString = "Friday";
					break;
			case 6: dayString = "Saturday";
					break;
			//如果case没有匹配的值，那么肯定是星期日
			default: dayString = "Sunday";
					 break;
		}
		System.out.println(dayString);

public interface IntefercaeDemo {

	//具体方法
	default void showDefault(){
		System.out.println("this is showDefault method");
	}
	static void showStatic(){
		System.out.println("this is showStatic method");
	}
	
	//没有实现的抽象方法
	void sayHi();
}

public class LearnDefault implements IntefercaeDemo{
	//实现抽象方法
	@Override
	public void sayHi() {
		System.out.println("this is sayHi mehtod");
	}
	
	public static void main(String[] args) {
		//接口中被static所修饰的具体方法
		IntefercaeDemo.showStatic();
		
		//将实现了IntefercaeDemo的类实例化
		LearnDefault learnDefault = new LearnDefault();
		//被Default所修饰的具体方法可以通过引用变量来调用
		learnDefault.showDefault();

	}
}

public class Demo{
	//没有访问修饰符修饰，所以默认为(default)
	String name;
	void show(){}
}