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public class Platypus {
String name;
Platypus(String input) {
name = input;
}
Platypus() {
this("John/Mary Doe");
}
public static void main(String args[]) {
Platypus p1 = new Platypus("digger");
Platypus p2 = new Platypus();
}
}
ÔÚÉÏÃæµÄ´úÂëÖУ¬ÓÐ2¸ö²»Í¬²ÎÊýÁбíµÄ¹¹ÔìÆ÷¡£µÚÒ»¸ö¹¹ÔìÆ÷£¬¸øÀàµÄ³ÉÔ±name¸³Öµ£¬µÚ¶þ¸ö¹¹ÔìÆ÷£¬µ÷ÓõÚÒ»¸ö¹¹ÔìÆ÷£¬¸ø³ÉÔ±±äÁ¿nameÒ»¸ö³õʼֵ "John/Mary Doe".
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2.ÎÞÂÛ¹¹ÔìÆ÷ºÍ·½·¨£¬¶¼Óùؼü×ÖsuperÖ¸Ïò³¬À࣬µ«ÊÇÓõķ½·¨²»Ò»Ñù¡£·½·¨ÓÃÕâ¸ö¹Ø¼ü×ÖÈ¥Ö´Ðб»ÖØÔصij¬ÀàÖеķ½·¨¡£
class Mammal1{
void getBirthInfo() {
System.out.println("born alive.");
}
}
class Platypus2 extends Mammal {
void getBirthInfo() {
System.out.println("hatch from eggs");
System.out.print("a mammal normally is ");
super.getBirthInfo();
}
}
public class TestMammal{
public static void main(String[] args){
Platypus2 pl = new Platypus2();
}
}
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