public Child(String name) { System.out.println(3); this.name = name; father = new People(name + "F"); } 所以接着就会输出“3”。3.执行People类的有参构造方法 再接下来，我们会看到Child有参构造方法的代码中，会再次实例化调用People的
*/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 */classFather{public...
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...
public void say(String name){ System.out.println(“Hello !”+name+”---FromFather”); }; } public class Child extends Fother{ //覆写父类的方法 public void say(String name){ System.out.println(“Hello ! ”+name+”---From Child”); }; } Father person1 =new Child(); Child person...
子类Child继承父类Father,我们可以编写一个指向子类的父类类型引用,该引用既可以处理父类Father对象,也可以处理子类Child对象,当相同的消息发送给子类或者父类对象时,该对象就会根据自己所属的引用而执行不同的行为,这就是多态。即多态性就是相同的消息使得不同的类做出不同的响应。
“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System.out.println(“创建ChildClass”);但是其第一步必定执行super();于是去执行其父类FatherClass类的构造方法,同理,FatherClass类构造方法执行的时候又得先得执行默认的...
图Child 类字节码test() 方法(2) 图Father类字节码test() 方法 根据上图我们发现,Child 类中我们重写了 test() 方法,但是在字节码层面,发现有两个 test() 方法,其中一个方法的访问标志为 [public synthetic bridge], 表示这个方法是编译器为我们生成的。而当我们不改变 Child#test() 方法的返回类型时,编译...
Child institutionalization Orphanage Parental attitudes West Java Indonesia 1. Introduction For a child, family provides the optimal environment for growth, nurturing, affection, and protection. Unfortunately, a combination of factors can disrupt this ideal scenario and contribute to children being placed ...
System.out.println(f1.getName());// Father System.out.println(f2.getName());// Father因为只用看引用,即左边的就行了,可以看出是Father 类,所以调用Father 类中的getName() System.out.println(c1.getName());// Child System.out.println("___age___"); System.out.println(f1.getAge...
This study was done to analyze the role of parent-child interaction, father's affection, andmedia exposure in aggressive behavior tendency among children. All participant (n = 293, aged 9-10) were included from children who live in coastal region (n = 105) and non-coastal region (n = ...