20170207问题解析请点击今日问题下方的“【Java每日一题】20170208”查看(问题解析在公众号首发,公众号ID:weknow619)java
package Feb2017; public class Ques0208 { } class Person{ private String id; private String name; public Person(String id, String name) { super(); this.id = id; this.name = name; } @Override public boolean equals(Object o) { if (o != null && o instanceof Person) { Person person = (Person)o; return (id.equals(person.id) && name.equals(person.name)); } return false; } }
今日问题:
请问Person类中的equals方法的if条件判断中,若是不检查对象是否为空(去掉o != null,只写o instanceof Person),当传进来的对象是null时,是否会报空指针异常?(点击如下“【Java每日一题】20170208”查看20170207问题解析)
题目原发布于公众号、简书:【Java每日一题】20170208,【Java每日一题】20170208 (也能够扫描头像二维码查看)
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