class Child extends Father{ public int i=2; //func1(int i)是对func1()方法的一个重载由于在父类中没有定义这个方法,所以它不能被父类类型的引用调用 //所以在下面的main方法中child.func1(68)是不对的 public void func1(int i){ System.out.println("BBB"); }
执行结果: 开始创建一个ChildClass对象… 创建FatherClass 创建ChildClass 要点: ①关于构造方法结合继承概念的调用,有如下的顺序,函数入口总是main,先执行System.out.println(“开始创建一个ChildClass对象…”)语句;然后我们调用了ChildClass这个类的构造方法,然后由于虽然在public ChildClass{}这个构造方法内并只写了S...
* 输出的结果 */publicclassFatherChild{/** *@paramargs*/@SuppressWarnings("static-access")publicstaticvoidmain(String[]args){Fatherfather=newFather();Fatherchild=newChild();System.out.println(father.getName());System.out.println(child.getName());}}/** * *@authorAdministrator * 父类 */cla...
public class FatherChild { /** * @param args */ @SuppressWarnings("static-access") public static void main(String[] args) { Father father = new Father(); Father child = new Child(); System.out.println(father.getName()); System.out.println(child.getName()); } } /** * * @autho...
classFather {publicvoidhello() { System.out.println("Father says hello."); } }publicclassChild extends Father {intage=10;staticintnumber=20;publicvoidhello() { System.out.println("Child says hello"); }publicstaticvoidmain(String[] a) ...
Child(String name) { System.out.println(3); this.name = name; father = new ...
public class Child extends Father{ public int age; public Child(){ super(); age=25...
泛型也可以继承和实现接口 public class Test{ public static void main(String[] args) { } } class Father{ } interface ARB{ } class child extends Father implemen...
publicclassTest{结果说明了什么 publicstaticvoidmain(String[]args){程序1: Childc=newChild();classFather{ }Father(){ }System.out.println(Fathers classFather{constructor); publicFather(){} System.out.println(父类无参构造函数);Father(inti){ }System.out.println(Fathers publicFather(Stringname){cons...
package com.bjsxt; public class FatherClass { public FatherClass() { System.out.println("FatherClassCreate"); } } 子类: package com.bjsxt; import com.bjsxt.FatherClass; public class ChildClass extends FatherClass { public ChildClass() { System.out.println("ChildClass Create"); } public sta...