112 lines
2.4 KiB
Java
112 lines
2.4 KiB
Java
package io.github.ehlxr.test;
|
||
|
||
import java.util.ArrayList;
|
||
import java.util.List;
|
||
|
||
/**
|
||
* 有一个学生浏览网页的记录程序，它将记录 每个学生访问过的网站地址。
|
||
* 它由三个部分组成：Student、WebPage和StudentTrace三个类
|
||
* <p>
|
||
* -XX:+HeapDumpBeforeFullGC -XX:HeapDumpPath=/Users/ehlxr/Downloads/hprof/student.hprof
|
||
*
|
||
* @author shkstart
|
||
* @create 16:11
|
||
*/
|
||
public class StudentTrace {
|
||
static List<WebPage> webpages = new ArrayList<>();
|
||
|
||
|
||
public static void createWebPages() {
|
||
for (int i = 0; i < 100; i++) {
|
||
WebPage wp = new WebPage();
|
||
wp.setUrl("http://www." + i + ".com");
|
||
wp.setContent(Integer.toString(i));
|
||
webpages.add(wp);
|
||
}
|
||
}
|
||
|
||
public static void main(String[] args) {
|
||
createWebPages();//创建了100个网页
|
||
//创建3个学生对象
|
||
Student st3 = new Student(3, "Tom");
|
||
Student st5 = new Student(5, "Jerry");
|
||
Student st7 = new Student(7, "Lily");
|
||
|
||
for (int i = 0; i < webpages.size(); i++) {
|
||
if (i % st3.getId() == 0)
|
||
st3.visit(webpages.get(i));
|
||
if (i % st5.getId() == 0)
|
||
st5.visit(webpages.get(i));
|
||
if (i % st7.getId() == 0)
|
||
st7.visit(webpages.get(i));
|
||
}
|
||
webpages.clear();
|
||
System.gc();
|
||
|
||
}
|
||
}
|
||
|
||
class Student {
|
||
private int id;
|
||
private String name;
|
||
private List<WebPage> history = new ArrayList<>();
|
||
|
||
public Student(int id, String name) {
|
||
super();
|
||
this.id = id;
|
||
this.name = name;
|
||
}
|
||
|
||
public int getId() {
|
||
return id;
|
||
}
|
||
|
||
public void setId(int id) {
|
||
this.id = id;
|
||
}
|
||
|
||
public String getName() {
|
||
return name;
|
||
}
|
||
|
||
public void setName(String name) {
|
||
this.name = name;
|
||
}
|
||
|
||
public List<WebPage> getHistory() {
|
||
return history;
|
||
}
|
||
|
||
public void setHistory(List<WebPage> history) {
|
||
this.history = history;
|
||
}
|
||
|
||
public void visit(WebPage wp) {
|
||
if (wp != null) {
|
||
history.add(wp);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
class WebPage {
|
||
private String url;
|
||
private String content;
|
||
|
||
public String getUrl() {
|
||
return url;
|
||
}
|
||
|
||
public void setUrl(String url) {
|
||
this.url = url;
|
||
}
|
||
|
||
public String getContent() {
|
||
return content;
|
||
}
|
||
|
||
public void setContent(String content) {
|
||
this.content = content;
|
||
}
|
||
}
|