JAVA抽象类与接口( 四 )

class Bike implements Vehicle{

public void start(String a) {

System.out.println(a+''i want bike!'');

public void stop(String b) {

System.out.println(b+''i want bus!'');

class Bus implements Vehicle{

public void start(String a) {

System.out.println(a+''i want bus!'');

public void stop(String b) {

System.out.println(b+''i want bike!'');

推荐阅读