\u6700\u8fd1\u505aJava\u5b9e\u9a8c，\u5199Student\u3001Goods\u5b9e\u4f53\u7c7b\u7684\u65f6\u5019，\u8e29\u4e86equals\u548c==\u7684\u5927\u5751\u3002\u5f88\u591a\u65b0\u624b\u5206\u4e0d\u6e05\u4ec0\u4e48\u65f6\u5019\u7528==，\u4ec0\u4e48\u65f6\u5019\u91cd\u5199equals，\u4eca\u5929\u7ed3\u5408\u5b9e\u9a8c\u4ee3\u7801\u4e00\u6b21\u6027\u8bb2\u6e05\u695a\u3002<\/p>\n
Object\u662fJava\u4e2d\u6240\u6709\u7c7b\u7684\u7236\u7c7b，\u6211\u4eec\u5199\u7684\u4efb\u4f55\u81ea\u5b9a\u4e49\u7c7b，\u9ed8\u8ba4\u7ee7\u627fObject\u3002Object\u81ea\u5e26\u4e24\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u65b9\u6cd5：toString()\u3001equals()，\u4e5f\u662f\u671f\u672b\u8003\u8bd5\u3001\u5b9e\u9a8c\u4f5c\u4e1a\u9ad8\u9891\u8003\u70b9\u3002<\/p>\n
\u4e00\u3001toString()\u65b9\u6cd5<\/p>\n
\u9ed8\u8ba4Object\u7684toString\u6253\u5370\u7684\u662f\u5bf9\u8c61\u5730\u5740，\u6ca1\u4ec0\u4e48\u610f\u4e49\u3002\u91cd\u5199toString()，\u53ef\u4ee5\u81ea\u5b9a\u4e49\u6253\u5370\u5bf9\u8c61\u7684\u4fe1\u606f，\u76f4\u63a5System.out.println(\u5bf9\u8c61)\u5c31\u4f1a\u81ea\u52a8\u8c03\u7528\u3002<\/p>\n
\u5b9e\u9a8c\u9700\u6c42：Student\u7c7b，\u8f93\u51fa\u683c\u5f0f：id: xxx, name: xxx, age: xxx<\/p>\n
public class Student {
\n\u00a0 \u00a0 \/\/ \u5c01\u88c5：\u79c1\u6709\u5c5e\u6027
\n\u00a0 \u00a0 private String id;
\n\u00a0 \u00a0 private String name;
\n\u00a0 \u00a0 private int age;<\/p>\n
\u00a0 \u00a0 \/\/ \u6784\u9020\u65b9\u6cd5
\n\u00a0 \u00a0 public Student(String id, String name, int age) {
\n\u00a0 \u00a0 \u00a0 \u00a0 this.id = id;
\n\u00a0 \u00a0 \u00a0 \u00a0 this.name = name;
\n\u00a0 \u00a0 \u00a0 \u00a0 this.age = age;
\n\u00a0 \u00a0 }<\/p>\n
\u00a0 \u00a0 \/\/ get set
\n\u00a0 \u00a0 public String getId() { return id; }
\n\u00a0 \u00a0 public void setId(String id) { this.id = id; }
\n\u00a0 \u00a0 public String getName() { return name; }
\n\u00a0 \u00a0 public void setName(String name) { this.name = name; }
\n\u00a0 \u00a0 public int getAge() { return age; }
\n\u00a0 \u00a0 public void setAge(int age) { this.age = age; }<\/p>\n
\u00a0 \u00a0 \/\/ \u91cd\u5199toString
\n\u00a0 \u00a0 @Override
\n\u00a0 \u00a0 public String toString() {
\n\u00a0 \u00a0 \u00a0 \u00a0 return "id: " + id + ", name: " + name + ", age: " + age;
\n\u00a0 \u00a0 }
\n}<\/p>\n
\u4e8c\u3001equals()\u91cd\u5199（\u91cd\u70b9！）<\/p>\n
==：\u5f15\u7528\u7c7b\u578b\u6bd4\u8f83\u5185\u5b58\u5730\u5740，\u53ea\u6709\u4e24\u4e2a\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u624d\u8fd4\u56detrue\u3002
\n\u9ed8\u8ba4Object\u7684equals\u5e95\u5c42\u5c31\u662f==\u3002
\n\u4e1a\u52a1\u9700\u6c42：\u5b66\u53f7\u76f8\u540c，\u5c31\u8ba4\u4e3a\u662f\u540c\u4e00\u4e2a\u5b66\u751f，\u548c\u5185\u5b58\u5730\u5740\u65e0\u5173，\u8fd9\u65f6\u5019\u5fc5\u987b\u91cd\u5199equals\u3002<\/p>\n
@Override
\npublic boolean equals(Object o) {
\n\u00a0 \u00a0 if (this == o) return true;
\n\u00a0 \u00a0 if (o == null || getClass() != o.getClass()) return false;
\n\u00a0 \u00a0 Student student = (Student) o;
\n\u00a0 \u00a0 \/\/ \u5224\u65ad\u5b66\u53f7\u76f8\u7b49\u5373\u76f8\u540c\u5bf9\u8c61
\n\u00a0 \u00a0 return id.equals(student.id);
\n}<\/p>\n
\u4e09\u3001\u6d4b\u8bd5\u7c7b<\/p>\n
public class TestStudent {
\n\u00a0 \u00a0 public static void main(String[] args) {
\n\u00a0 \u00a0 \u00a0 \u00a0 Student s1 = new Student("1111111111","xxx",19);
\n\u00a0 \u00a0 \u00a0 \u00a0 Student s2 = new Student("1111111111","\u5f20\u4e09",20);
\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(s1);
\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println("s1\u548cs2\u662f\u5426\u662f\u540c\u4e00\u4e2a\u5b66\u751f：" + s1.equals(s2));
\n\u00a0 \u00a0 }
\n}<\/p>\n
\u8fd0\u884c\u7ed3\u679c：id: 1111111111, name: xxx, age: 191
\ns1\u548cs2\u662f\u5426\u662f\u540c\u4e00\u4e2a\u5b66\u751f：true<\/p>\n
\u56db\u3001\u5b9e\u9a8c\u6613\u9519\u603b\u7ed3<\/p>\n
1. \u5c01\u88c5：\u6210\u5458\u53d8\u91cf\u7528private，\u5916\u90e8\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee，\u5fc5\u987bget\/set\u3002<\/p>\n
2. equals\u91cd\u5199\u4e00\u5b9a\u8981\u505a\u7c7b\u578b\u5224\u65ad，\u9632\u6b62\u7c7b\u578b\u8f6c\u6362\u5f02\u5e38\u3002<\/p>\n
3. \u533a\u5206：==\u6bd4\u8f83\u5730\u5740；\u91cd\u5199\u540e\u7684equals\u6bd4\u8f83\u5bf9\u8c61\u5185\u5bb9\u3002<\/p>\n
\u7ed3\u5c3e<\/p>\n
\u672c\u6b21\u5b9e\u9a8c\u7684Goods\u5546\u54c1\u7c7b\u601d\u8def\u5b8c\u5168\u4e00\u6837，\u6839\u636e\u5546\u54c1\u7f16\u53f7\u91cd\u5199equals\u3002<\/p>\n
\u00a0<\/p>\n
\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6700\u8fd1\u505aJava\u5b9e\u9a8c，\u5199Student\u3001Goods\u5b9e\u4f53\u7c7b\u7684\u65f6\u5019，\u8e29\u4e86equals\u548c\u7684\u5927\u5751\u3002\u5f88\u591a\u65b0\u624b\u5206\u4e0d\u6e05\u4ec0\u4e48\u65f6\u5019\u7528，\u4ec0\u4e48\u65f6\u5019\u91cd\u5199equals，\u4eca\u5929\u7ed3\u5408\u5b9e\u9a8c\u4ee3\u7801\u4e00\u6b21\u6027\u8bb2\u6e05\u695a\u3002Object\u662fJava\u4e2d\u6240\u6709\u7c7b\u7684\u7236\u7c7b，\u6211\u4eec\u5199\u7684\u4efb\u4f55\u81ea\u5b9a\u4e49\u7c7b，\u9ed8\u8ba4\u7ee7\u627fObject\u3002Object\u81ea\u5e26\u4e24\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u65b9\u6cd5：toString()\u3001equals()，\u4e5f\u662f\u671f\u672b\u8003\u8bd5\u3001\u5b9e\u9a8c\u4f5c\u4e1a\u9ad8\u9891\u8003\u70b9\u3002\u4e00\u3001to<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[882],"topic":[],"class_list":["post-114287","post","type-post","status-publish","format-standard","hentry","category-server","tag-idea"],"yoast_head":"\n