---
title: "Reference"
source: "https://cheerpj.com/docs/reference"
---

# Reference

- [cheerpjInit](https://cheerpj.com/docs/reference/cheerpjInit.md)

  [Set up and initialize the CheerpJ runtime environment](https://cheerpj.com/docs/reference/cheerpjInit.md)
- [cheerpjRunMain](https://cheerpj.com/docs/reference/cheerpjRunMain.md)

  [Starts an application by executing the static main method of a Java class](https://cheerpj.com/docs/reference/cheerpjRunMain.md)
- [cheerpjRunJar](https://cheerpj.com/docs/reference/cheerpjRunJar.md)

  [Execute the main class of a JAR](https://cheerpj.com/docs/reference/cheerpjRunJar.md)
- [cheerpjRunLibrary](https://cheerpj.com/docs/reference/cheerpjRunLibrary.md)

  [Load a Java Library](https://cheerpj.com/docs/reference/cheerpjRunLibrary.md)
- [cheerpjCreateDisplay](https://cheerpj.com/docs/reference/cheerpjCreateDisplay.md)

  [Display GUI elements](https://cheerpj.com/docs/reference/cheerpjCreateDisplay.md)
- [cjFileBlob](https://cheerpj.com/docs/reference/cjFileBlob.md)

  [Read a file from the virtual filesystem](https://cheerpj.com/docs/reference/cjFileBlob.md)
- [cheerpOSAddStringFile](https://cheerpj.com/docs/reference/cheerpOSAddStringFile.md)

  [Write a file into the virtual filesystem](https://cheerpj.com/docs/reference/cheerpOSAddStringFile.md)
- [cheerpOSRemoveStringFile](https://cheerpj.com/docs/reference/cheerpOSRemoveStringFile.md)

  [Remove a file from the virtual filesystem](https://cheerpj.com/docs/reference/cheerpOSRemoveStringFile.md)
- [cjGetRuntimeResources](https://cheerpj.com/docs/reference/cjGetRuntimeResources.md)

  [List resources that were loaded](https://cheerpj.com/docs/reference/cjGetRuntimeResources.md)
- [cjGetProguardConfiguration](https://cheerpj.com/docs/reference/cjGetProguardConfiguration.md)

  [Download a ProGuard configuration file](https://cheerpj.com/docs/reference/cjGetProguardConfiguration.md)
- [CJ3Library](https://cheerpj.com/docs/reference/CJ3Library.md)

  [A library mode session](https://cheerpj.com/docs/reference/CJ3Library.md)