//父類
public?class?Transport?{
?public?void?Mode(){
??System.out.println("多種運輸方式");
?}
}
//子類
public?class?Airplane?extends?Transport?{
?public?int?Load;
?//方法的重寫
?public?void?Mode(){
??System.out.println("飛機在天上飛");
?}
}
public?class?Bus?extends?Transport?{
?public?int?Load;
?//方法的重寫
?public?void?Mode(){
??System.out.println("公車在路上跑");
?}
}
public?class?Ship?extends?Transport?{
?public?int?Load;
?//方法的重寫
?public?void?Mode(){
??System.out.println("船在海上漂");
?}
}
//輸出
public?class?Test?{
?public?static?void?main(String[]?args){
??
?//父類指向子類對象的多態
?Transport?Tr1=new?Bus();
?Transport?Tr2=new?Airplane();
?Transport?Tr3=new?Ship();
?//父類指向父類的對象的多態
?Transport?Tr4=new?Transport();
?//調用子類的屬性與方法
?Tr1.Mode();
?System.out.println("公交載荷為："+40);
?Tr2.Mode();
?System.out.println("飛機載荷為："+100);
?Tr3.Mode();
?System.out.println("輪船載荷為："+200);
?//調用父類的屬性與方法
?Tr4.Mode();
????}
}