static关键字学习笔记

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//  static   关键字      class erson {private String name;static private String contry = "南京";/* * private String contry = "南京"; 没有添加static关键字在下面修改contry时需要每一个对象都修改一次 * 添加了static关键字之后，所有对象只需要修改一次contry */public String getName() {return name;}public void setName(String name) {this.name = name;}public String getContry() {return contry;}public void setContry(String contry) {this.contry = contry;}public void tell() {System.out.println("姓名:" + name + "      出生地:" + contry);}}public class index06 {//public static void main(String[] args) {erson per1 = new erson();per1.setName("张三");per1.setContry("北京");// 添加了static关键字之后只修改一次，后面的对象里调用也被修改。per1.tell();erson per2 = new erson();per2.setName("赵四");per2.tell();erson per3 = new erson();per3.setName("王五");per3.tell();}}

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