关于类的位置问题~~谢过牛人~~

[dundun1513]

先贴个正确的~~


class Father {
public int age;
void info() {
age = 100;
System.out.println(age);
}
}

class Son extends Father {
public int age;
void info() {
super.info();

age = 10;
System.out.println("son: "+age+" "+this.age+" "+super.age);
}
}

public class TestOverRide {
public static void main(String[] args) {
// TODO Auto-generated method stub
Father father = new Father();
Son son = new Son();

father.info();
son.info();
}

}
但是改动了下类的位置后，就出错了，这是为什么呢？ 先谢过~~ 下面是错误程序

public class TestOverRide {
class Father {
public int age;
void info() {
age = 100;
System.out.println(age);
}
}

class Son extends Father {
public int age;
void info() {
super.info();

age = 10;
System.out.println("son: "+age+" "+this.age+" "+super.age);
}
}


public static void main(String[] args) {
// TODO Auto-generated method stub
Father father = new Father();
Son son = new Son();

father.info();
son.info();
}

}

[knightzhuwei]

public class TestOverRide {
	static class Father {
		public int age;

		void info() {
			age = 100;
			System.out.println(age);
		}
	}

	static class Son extends Father {
		public int age;

		void info() {
			super.info();

			age = 10;
			System.out
					.println("son: " + age + " " + this.age + " " + super.age);
		}
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Father father = new Father();
		Son son = new Son();

		father.info();
		son.info();
	}

}

[magicbu]

改后father和son都变成了内部类，在外部类未实例化的情况下，内部类如何实例化！

[dundun1513]

谢谢你了，了解了~~