class person {
void speak (){
System.out.println(
"我是形式参数的引用类型");
}
}
class PersonDemo {
void speaks (Person p){
p.speak;
}
}
在主函数中调用
public static void main(String[] args) {
PersonDemo demo =
new PersonDemo();
Person p =
new Person();
demo.speaks(p);
}
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