10.1

package tex;
public abstract class one {
	abstract void test();
	public static void main(String args[]) {
		new one();
	}
}
//無法例項化

10.2

package tex;

public class Fu {
	public void one() {
		System.out.println("父類函式1.");
	}
	public void two() {
		System.out.println("父類函式2.");
	}
	public static void main(String args[]) {
		Fu a=new Zi();
		a.two();
	}
}

package tex;

public class Zi extends Fu {
	public void two() {
		System.out.println("子類函式2.");
	}
	
}