Jprofile 的监控内存泄漏程序实例

小咪咪 2022-09-10 03:10 148阅读 0赞

# 一 代码 #

package chapter03;
    
    import java.util.ArrayList;
    import java.util.concurrent.TimeUnit;
    
    public class MemoryLeak1 {
    
        public static void main(String[] args) {
            while (true) {
                ArrayList list = new ArrayList();
                for (int i = 0; i < 500; i++) {
                    Bean data = new Bean();
                    data.list.add(new byte[1024 * 10]);// 10kb
                    list.add(data);
                }
                try {
                    TimeUnit.MILLISECONDS.sleep(500);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    
    class Bean {
        private int size = 10;
        private String info = "hello,China";
        static ArrayList list = new ArrayList(); // 发生内存泄漏
        // ArrayList list = new ArrayList(); // 不发生内存泄漏
    }

# 二 总体分析 #

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16][]

# 三 内存走势 #

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16 1][]

# 四 内存对象分析 #

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16 2][]

# 五 byte\[\] 引用分析 #

## 1 以树型结构反应 ##

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16 3][]

## 2 以图展示 ##

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16 1][]

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/2d0253275809435197e14d429ae6a505.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16 1]: /images/20220829/efb3f46255c54008818264d74a9ad801.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16 2]: /images/20220829/8d3cc914e17a4e458e34a7b748651f33.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16 3]: /images/20220829/24e2440c318b4867b17172bc16009eb9.png