源代码1:
public class Father{
public Father(){
System.out.println("无参的父类构造函数!!");
}
public Father(String s){
System.out.println("有参的父类构造函数——"+s);
}
}
源代码2
public class Son extends Father{
public Son(){
System.out.println("无参的子类构造函数!!");
}
public Son(String s){
System.out.println("有参的子类构造函数——"+s);
}
}
源代码3
public class Test4_4{
public static void main(String []args){
Son s1=new Son("哈哈");
//s1.Son();
Son s2=new Son();
}
}