1. Person 클래스 class Person { private int num; private String name; public int getNum() { return num; } public void setNum(int num) { this.num = num; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public int hashCode() { return Objects.hash(name, num); } //@Override //public boolean equals(Object obj) { //if (this == obj) { // 참조값이 같으면 ..
