如果您够勇敢，可以自己编译源代码。

If you're brave enough, you can compile the source code for yourself.

youdao

编译源代码来创建类文件。

Compile the source code to create your class files.

youdao

注意，编译源代码需要 JDK 5+。

Notice that JDK 5+ is required to compile the source code.

youdao

And you can write your source code in it but to compile something you don't run a command like GCC and then the name of the file, you instead click a button.

你们可以在上面写源代码,如果要编译的话，不用像GCC这样要输入命令，文件名,只需点击按钮就可以了。

哈佛公开课 - 计算机科学课程节选