Now my java is the latest version,java8 291.But other errors occurred:
A problem occurred configuring root project 'forge-1.16.5-36.1.32-mdk '.
> Could not resolve all artifacts for configuration ':classpath'.
> Could not download fastutil-8.3.1.jar (it.unimi.dsi:fastutil:8.3.1)
> Could not get resource 'https://maven.minecraftforge.net/it/unimi/dsi/fastutil/8.3.1/fastutil-8.3.1.jar'.
> Could not GET 'https://maven.minecraftforge.net/it/unimi/dsi/fastutil/8.3.1/fastutil-8.3.1.jar'.
> maven.minecraftforge.net
Change version to recommended version 1.16.5-36.1.0:
A problem occurred configuring root project 'forge-1.16.5-36.1.0-mdk'.
> Could not resolve all files for configuration ':_compileJava_1'.
> Could not download icu4j-66.1.jar (com.ibm.icu:icu4j:66.1)
> Could not get resource 'https://maven.minecraftforge.net/com/ibm/icu/icu4j/66.1/icu4j-66.1.jar'.
> Premature end of Content-Length delimited message body (expected: 12,935,630; received: 6,042,560)
> Could not download fastutil-8.2.1.jar (it.unimi.dsi:fastutil:8.2.1)
> Could not get resource 'https://maven.minecraftforge.net/it/unimi/dsi/fastutil/8.2.1/fastutil-8.2.1.jar'.
> Premature end of Content-Length delimited message body (expected: 18,800,417; received: 7,013,368)