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| Squawk | |
|---|---|
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| Developer | Sun Microsystems |
| Initial release | April 2002; 23 years ago (2002-04) |
| Written in | C andJava |
| Operating system | Cross-platform |
| Type | Java virtual machine |
| License | GNU General Public License |
| Website | java |
| Repository | github |
Squawk is aJavamicro editionvirtual machine for embedded system and small devices. Most virtual machines for the Java platform are written in low level native languages such asC/C++ andassembler; what makes Squawk different is that Squawk's core is mostly written inJava (this is called ameta-circular interpreter). A Java implementation provides ease of portability, and integration of virtual machine and application resources such as objects, threads, and operating-system interfaces.
The Squawk Virtual Machine figure can be simplified as:
The research project was inspired bySqueak. Squawk has aJava ME heritage and features a smallmemory footprint.[1] It was developed to be simple with minimal external dependencies. Its simplicity made it portable and easy to debug and maintain. Squawk also provides an isolated mechanism by which an application is represented as an object. In Squawk, one or more applications can run in the single JVM. Conceptually, each application is completely isolated from all other applications.
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