---
title: Execution process
description: "``` flowchart TD A[\"Start\"] --> B[\"Generate range(10)\"] B --> C[\"Initialize i = 0\"] C --> D{\"Is i < 10?\"} D -- No --> H[\"Loop ends, return final list of 10 hex strings\"] H --> I[\"End\"] D -- Yes --> E[\"Call…"
url: "https://www.nullflag.com/support/kb/cpp_c_java_arm64_javascript/java_basic/work-flow-showing-design/"
updated: "2025-12-24"
category: Java Basic Knowledge
---

# Execution process

```
flowchart TD
    A["Start"] --> B["Generate range(10)"]
    B --> C["Initialize i = 0"]
    C --> D{"Is i < 10?"}
    D -- No --> H["Loop ends, return final list of 10 hex strings"]
    H --> I["End"]
    D -- Yes --> E["Call random.randint(0,255)"]
    E --> F["Format '%02x' % value --> two-digit hex string"]
    F --> G["Append formatted string to list"]
    G --> J["Increment i = i + 1"]
    J --> D
```

This is a sequence diagram. The interpretation effect is very good!

```
sequenceDiagram
    participant C as Customer
    participant S as Shop System
    participant P as Payment Gateway
    participant W as Warehouse
    participant D as Delivery Service

    C->>S: Place Order
    S->>P: Request Payment
    P-->>S: Payment Success
    S->>W: Send Order Details
    W->>W: Pick & Pack Items
    W->>D: Hand over Package
    D-->>C: Deliver Package
    C-->>S: Order Received Confirmation
```

```
flowchart TD
    A(("You have decided to play a game tonight")) --> n8(["Great!!!"])
    ny{{"Are you going to play alone?"}} -- Yes --> nq{{"Singleplayer games"}}
    n8 --> np("Start your computer")
    np --> ny & n7("Are your friends online?")
    n7 -- Yes --> nw["Do they wanna play?"]
    nq --> nc{{"Time to pick the game"}}
    n7 -- No --> nq
    nw -- No --> nq
    nw -- Yes --> n2("time to pick the game")
    n2 --> n1("World of Warcraft") & n9("StarCraft") & nj("League of legends") & ns("DOTA 2") & nu("Minecraft")
    nc --> ni{{"DOOM"}} & nk{{"Baldurs Gate 3"}} & nb{{"Fallout new vegas"}} & n0{{"Witcher"}} & nl{{"Sims"}}
    nl --> nf[["Now that you have picked a game"]]
    n0 --> nf
    nb --> nf
    nk --> nf
    ni --> nf
    n1 --> no[["Now that you have picked a game"]]
    n9 --> no
    nj --> no
    ns --> no
    nu --> no
    nf --> nd{"Great have fun!"}
    no --> nd
    ny -- No --> n7

    nw@{ shape: lean-r}
    style A fill:#C8E6C9,stroke-width:4px,stroke-dasharray: 0,stroke:#00C853
    style n8 stroke-width:4px,stroke-dasharray: 0,fill:#C8E6C9,stroke:#00C853
    style ny stroke-width:4px,stroke-dasharray: 0,stroke:#FF6D00,fill:#FFE0B2
    style nq stroke-width:4px,stroke-dasharray: 0,stroke:#FF6D00,fill:#FFE0B2
    style np stroke:#00C853,stroke-width:4px,stroke-dasharray: 0
    style n7 stroke-width:4px,stroke-dasharray: 0,fill:#BBDEFB,stroke:#2962FF
    style nw stroke-width:4px,stroke-dasharray: 0,stroke:#2962FF,fill:#BBDEFB
    style nc stroke-width:4px,stroke-dasharray: 0,stroke:#FF6D00,fill:#FFE0B2
    style n2 stroke-width:4px,stroke-dasharray: 0,fill:#BBDEFB,stroke:#2962FF
    style n1 stroke-width:4px,stroke-dasharray: 0,fill:#BBDEFB,stroke:#2962FF
    style n9 stroke-width:4px,stroke-dasharray: 0,fill:#BBDEFB,stroke:#2962FF
    style nj stroke-width:4px,stroke-dasharray: 0,fill:#BBDEFB,stroke:#2962FF
    style ns stroke-width:4px,stroke-dasharray: 0,fill:#BBDEFB,stroke:#2962FF
    style nu stroke-width:4px,stroke-dasharray: 0,fill:#BBDEFB,stroke:#2962FF
    style ni stroke-width:4px,stroke-dasharray: 0,fill:#FFE0B2,stroke:#FF6D00
    style nk stroke-width:4px,stroke-dasharray: 0,stroke:#FF6D00,fill:#FFE0B2
    style nb stroke-width:4px,stroke-dasharray: 0,stroke:#FF6D00,fill:#FFE0B2
    style n0 stroke-width:4px,stroke-dasharray: 0,stroke:#FF6D00,fill:#FFE0B2
    style nl stroke-width:4px,stroke-dasharray: 0,stroke:#FF6D00,fill:#FFE0B2
    style nf stroke:#AA00FF,stroke-width:4px,stroke-dasharray: 0,fill:#E1BEE7
    style no stroke-width:4px,stroke-dasharray: 0,fill:#E1BEE7,stroke:#AA00FF
    style nd stroke-width:4px,stroke-dasharray: 0,stroke:#AA00FF,fill:#C8E6C9
```

```
---
config:
  sankey:
    showValues: false
---
sankey-beta

Agricultural 'waste',Bio-conversion,124.729
Bio-conversion,Liquid,0.597
Bio-conversion,Losses,26.862
Bio-conversion,Solid,280.322
Bio-conversion,Gas,81.144
Biofuel imports,Liquid,35
Biomass imports,Solid,35
Coal imports,Coal,11.606
Coal reserves,Coal,63.965
Coal,Solid,75.571
District heating,Industry,10.639
District heating,Heating and cooling - commercial,22.505
District heating,Heating and cooling - homes,46.184
Electricity grid,Over generation / exports,104.453
Electricity grid,Heating and cooling - homes,113.726
Electricity grid,H2 conversion,27.14
Electricity grid,Industry,342.165
Electricity grid,Road transport,37.797
Electricity grid,Agriculture,4.412
Electricity grid,Heating and cooling - commercial,40.858
Electricity grid,Losses,56.691
Electricity grid,Rail transport,7.863
Electricity grid,Lighting & appliances - commercial,90.008
Electricity grid,Lighting & appliances - homes,93.494
Gas imports,Ngas,40.719
Gas reserves,Ngas,82.233
Gas,Heating and cooling - commercial,0.129
Gas,Losses,1.401
Gas,Thermal generation,151.891
Gas,Agriculture,2.096
Gas,Industry,48.58
Geothermal,Electricity grid,7.013
H2 conversion,H2,20.897
H2 conversion,Losses,6.242
H2,Road transport,20.897
Hydro,Electricity grid,6.995
Liquid,Industry,121.066
Liquid,International shipping,128.69
Liquid,Road transport,135.835
Liquid,Domestic aviation,14.458
Liquid,International aviation,206.267
Liquid,Agriculture,3.64
Liquid,National navigation,33.218
Liquid,Rail transport,4.413
Marine algae,Bio-conversion,4.375
Ngas,Gas,122.952
Nuclear,Thermal generation,839.978
Oil imports,Oil,504.287
Oil reserves,Oil,107.703
Oil,Liquid,611.99
Other waste,Solid,56.587
Other waste,Bio-conversion,77.81
Pumped heat,Heating and cooling - homes,193.026
Pumped heat,Heating and cooling - commercial,70.672
Solar PV,Electricity grid,59.901
Solar Thermal,Heating and cooling - homes,19.263
Solar,Solar Thermal,19.263
Solar,Solar PV,59.901
Solid,Agriculture,0.882
Solid,Thermal generation,400.12
Solid,Industry,46.477
Thermal generation,Electricity grid,525.531
Thermal generation,Losses,787.129
Thermal generation,District heating,79.329
Tidal,Electricity grid,9.452
UK land based bioenergy,Bio-conversion,182.01
Wave,Electricity grid,19.013
Wind,Electricity grid,289.366
```

```
xychart-beta
    title "Training progress"
    x-axis [mon, tues, wed, thur, fri, sat, sun]
    y-axis "Time trained (minutes)" 0 --> 300
    bar [60, 0, 120, 180, 230, 300, 0]
    line [60, 0, 120, 180, 230, 300, 0]
```

```
gitGraph TB:
          commit
          commit
          branch develop
          commit
          commit
          checkout main
          commit
          commit
          merge develop
          commit
          commit
```

```
requirementDiagram

    requirement test_req {
    id: 1
    text: the test text.
    risk: high
    verifyMethod: test
    }

    functionalRequirement test_req2 {
    id: 1.1
    text: the second test text.
    risk: low
    verifyMethod: inspection
    }

    performanceRequirement test_req3 {
    id: 1.2
    text: the third test text.
    risk: medium
    verifyMethod: demonstration
    }

    interfaceRequirement test_req4 {
    id: 1.2.1
    text: the fourth test text.
    risk: medium
    verifyMethod: analysis
    }

    physicalRequirement test_req5 {
    id: 1.2.2
    text: the fifth test text.
    risk: medium
    verifyMethod: analysis
    }

    designConstraint test_req6 {
    id: 1.2.3
    text: the sixth test text.
    risk: medium
    verifyMethod: analysis
    }

    element test_entity {
    type: simulation
    }

    element test_entity2 {
    type: word doc
    docRef: reqs/test_entity
    }

    element test_entity3 {
    type: "test suite"
    docRef: github.com/all_the_tests
    }

    test_entity - satisfies -> test_req2
    test_req - traces -> test_req2
    test_req - contains -> test_req3
    test_req3 - contains -> test_req4
    test_req4 - derives -> test_req5
    test_req5 - refines -> test_req6
    test_entity3 - verifies -> test_req5
    test_req <- copies - test_entity2
```

## Vidstack Player 插件调用链

### 1. WordPress Hooks 执行顺序 (序列图)

```
sequenceDiagram
    participant WP as WordPress
    participant Plugin as Vidstack_Player
    participant Theme as 主题

    WP->>Plugin: plugins_loaded
    Plugin->>Plugin: get_instance()
    Plugin->>WP: add_action('init')

    Note over WP,Theme: 页面加载
    WP->>Plugin: init (init Hook)
    Plugin->>Plugin: 注册 shortcode
    Plugin->>Theme: add_filter('body_class')

    WP->>Plugin: wp_enqueue_scripts
    Plugin->>Plugin: enqueue_assets()
    Plugin->>WP: wp_enqueue_style()
    Plugin->>WP: wp_enqueue_script()

    WP->>Plugin: wp_footer (999 优先级)
    Plugin->>Theme: output_player_scripts()
```

### 2. 插件初始化流程 (流程图)

```
graph TD
    A[WordPress 启动] --> B{插件已激活?}
    B -->|是| C[加载 vidstack-player.php]
    B -->|否| D[跳过]
    C --> E[创建 Vidstack_Player 实例]
    E --> F[__construct]
    F --> G[注册激活钩子]
    F --> H[register_activation_hook]
    F --> I[注册 init Hook]
    F --> J[注册 wp_enqueue_scripts]
    I --> K[init 函数]
    K --> L[加载文本域]
    J --> M[enqueue_assets 函数]
```

### 3. 函数调用依赖关系 (调用图)

```
graph TD
A[vidstack_player shortcode] --> B[render_player]
B --> C[提取属性]
B --> D[生成 HTML]
D --> E[media-player 组件]
E --> F
F --> G[hls.js]
F --> H[ Vidstack 播放器]
```

DOM 树形结构 - Flowchart 格式

```
flowchart TB
    ROOT[HTML Document]

    %% 第一层分支
    ROOT --> D1[learndash-wrapper]
    ROOT --> D115[wpadminbar]
    ROOT --> D117[query-monitor-main]

    %% learndash-wrapper 分支
    D1 --> D2[ld-focus]

    %% ld-focus 主要分支
    D2 --> SIDEBAR[ld-focus-sidebar<br/>侧边栏区域]
    D2 --> MAIN[ld-focus-main<br/>主内容区域]

    %% ========== 侧边栏区域 ==========
    SIDEBAR --> D4[ld-course-navigation-heading]
    SIDEBAR --> D5[ld-focus-sidebar-wrapper]
    D5 --> D6[ld-course-navigation-list]
    D6 --> D7[ld-lesson-navigation]
    D7 --> D8[ld-lesson-items]

    %% 课程项列表
    D8 --> SECTION1[章节1区域]
    D8 --> SECTION2[章节2区域]
    D8 --> SECTION3[展开课程区域]

    SECTION1 --> D9[ld-lesson-item-section-heading-1]
    SECTION1 --> D10[ld-lesson-item-1]
    D10 --> D11[ld-lesson-item-preview]
    D11 --> D12[ld-status-icon]
    D11 --> D13[ld-lesson-title]

    SECTION2 --> D14[ld-lesson-item-section-heading-2]
    SECTION2 --> D15[ld-lesson-item-current]
    D15 --> D16[ld-lesson-item-preview-2]
    D16 --> D17[ld-status-icon-2]
    D16 --> D18[ld-lesson-title-2]

    SECTION3 --> D27[ld-lesson-item-expanded]
    D27 --> D28[ld-table-list]
    D28 --> D29[ld-table-list-items]
    D29 --> D30[ld-table-list-item]
    D30 --> D31[ld-status-icon-3]
    D30 --> D32[ld-topic-title]

    %% ========== 主内容区域 ==========
    MAIN --> HEADER[ld-focus-header<br/>头部区域]
    MAIN --> D84[ld-presenter-mode]
    MAIN --> CONTENT[ld-focus-content<br/>内容区域]

    %% 头部区域
    HEADER --> D70[ld-mobile-nav]
    HEADER --> D71[ld-brand-logo]
    HEADER --> PROGRESS[ld-progress<br/>进度条]
    HEADER --> ACTIONS[ld-content-actions<br/>操作区]
    HEADER --> D83[ld-user-menu]

    %% 进度条
    PROGRESS --> D73[ld-progress-wrap]
    D73 --> D74[ld-progress-heading]
    D73 --> STATS[ld-progress-stats]
    D73 --> BAR[ld-progress-bar]

    STATS --> D76[ld-progress-percentage]
    STATS --> D77[ld-progress-steps]
    BAR --> D79[ld-progress-bar-percentage]

    %% 操作区
    ACTIONS --> D81[ld-content-action-1]
    ACTIONS --> D82[ld-content-action-2]

    %% 内容区域
    CONTENT --> D86[learndash-post-sfwd-lessons]
    D86 --> D87[learndash-wrapper-content]
    D87 --> D88[learndash-wrapper-shortcode]

    D88 --> STATUS[ld-lesson-status]
    D88 --> TABS[ld-tabs<br/>标签页区域]

    STATUS --> D90[ld-status]

    %% 标签页
    TABS --> D92[ld-tabs-navigation]
    TABS --> D93[ld-tabs-content]

    D93 --> TAB1[ld-tab-content-visible<br/>视频标签页]
    D93 --> TAB2[ld-tab-content-material<br/>材料标签页]

    %% 视频播放器
    TAB1 --> PLAYER[vidstack-player-container<br/>播放器容器]

    PLAYER --> GESTURE[vds-gestures]
    PLAYER --> D97[vds-buffering-indicator]
    PLAYER --> KEYBOARD[vds-kb-action]
    PLAYER --> D101[vds-scrim]
    PLAYER --> D102[vds-controls-spacer]
    PLAYER --> SLIDER[vds-slider-chapter<br/>滑块区域]
    PLAYER --> TIME[vds-time-group]

    %% 键盘操作
    KEYBOARD --> D99[vds-kb-text-wrapper]
    D99 --> D100[vds-kb-text]

    %% 滑块
    SLIDER --> D104[vds-slider-track]
    D104 --> D105[vds-slider-track-fill]
    D104 --> D106[vds-slider-progress]
    D104 --> D107[vds-slider-chapter-inner]
    D107 --> D108[vds-slider-thumb]
    D107 --> D109[vds-slider-chapter-title]

    %% 时间组
    TIME --> D111[vds-time-divider]

    %% 材料标签页
    TAB2 --> D113[learndash-wrapper-nav]
    D113 --> D114[ld-content-actions-2]

    %% ========== WordPress 管理栏 ==========
    D115 --> D116[quicklinks]

    %% ========== Query Monitor ==========
    D117 --> D118[qm-side-resizer]
    D117 --> QMTITLE[qm-title]
    D117 --> QMWRAP[qm-wrapper]

    QMTITLE --> D120[qm-title-heading]

    QMWRAP --> D122[qm-panels]
    D122 --> PANEL1[qm-panel-container-overview<br/>概览面板]
    D122 --> PANEL2[qm-panel-container-logs<br/>日志面板]

    PANEL1 --> D124[qm-non-tabular]
    D124 --> D125[qm-boxed-1]
    D125 --> D126[qm-grid]

    PANEL2 --> D128[qm-logger]
    D128 --> D129[qm-boxed-2]
    D129 --> D130[qm-notice]

    %% 样式定义
    classDef rootStyle fill:#667eea,stroke:#333,stroke-width:4px,color:#fff,font-weight:bold
    classDef groupStyle fill:#e3f2fd,stroke:#1976d2,stroke-width:3px,font-weight:bold
    classDef sidebarStyle fill:#e8f5e9,stroke:#388e3c,stroke-width:2px
    classDef mainStyle fill:#fff3e0,stroke:#f57c00,stroke-width:2px
    classDef playerStyle fill:#fce4ec,stroke:#c2185b,stroke-width:2px
    classDef adminStyle fill:#eceff1,stroke:#546e7a,stroke-width:2px
    classDef monitorStyle fill:#e8eaf6,stroke:#3f51b5,stroke-width:2px

    class ROOT rootStyle
    class SIDEBAR,MAIN,HEADER,CONTENT,PLAYER,TABS groupStyle
    class D3,D4,D5,D6,D7,D8,SECTION1,SECTION2,SECTION3 sidebarStyle
    class D68,D69,D70,D71,PROGRESS,ACTIONS,D83,D84,D85,D86,D87,D88 mainStyle
    class D95,D96,D97,GESTURE,KEYBOARD,SLIDER,TIME playerStyle
    class D115,D116 adminStyle
    class D117,D118,QMTITLE,QMWRAP,PANEL1,PANEL2 monitorStyle
```