Memory Analyzer分析内存泄漏

模拟一次内存溢出

1. 程序不断地向ArrayList添加对象，直至溢出

public class User {
    String userName;
    String passWord;

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassWord() {
        return passWord;
    }

    public void setPassWord(String passWord) {
        this.passWord = passWord;
    }
}

import java.util.ArrayList;
import java.util.List;

public class jvmMemoryOut {

    public static void main(String[] args) {
        List<Object> listObject = new ArrayList<>();
        for (int i = 0; i < 100000; i++) {
            System.out.println("i:" + i);
            User user = new User();
            user.setUserName("小明");
            user.setPassWord("123456");
            listObject.add(user);
        }
        System.out.println("添加成功...");
    }
}

2. VM设置

-Xms1m -Xmx2m -XX:+PrintGCDetails -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=C:\Users\0096001939\Desktop\dump

3. 运行后获得dump文件

Memory Analyzer打开dump文件

1. 查看到概览，然后我们打开details
   

2. 通过details我们看到多个user在一个list中，撑爆了内存
   

3. 查看user所在线程的详情.

本文地址：https://blog.csdn.net/growing1224/article/details/112002370