10.1
package tex; public abstract class one { abstract void test(); public static void main(String args[]) { new one(); } } //无法实例化
10.2
package tex; public class Fu { public void one() { System.out.println("父类函数1."); } public void two() { System.out.println("父类函数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("子类函数2."); } }