Error:java: invalid source release: 8 in Intellij. What does it mean?

Error:java: invalid source release: 8 in Intellij. What does it mean?

java intellij-idea compilation javac intellij-13

java

Why does a Java class compile differently with a blank line?

java compilation javac bytecode

java

Java method with return type compiles without return statement

java syntax while-loop compilation return

java

Is Java a Compiled or an Interpreted programming language ?

java compilation interpretation

java

IntelliJ IDEA 13 uses Java 1.5 despite setting to 1.7

java intellij-idea compilation

java

Building vs. Compiling (Java)

java build compilation

java

Compiling a java program into an executable [duplicate]

java executable compilation

java

javac : command not found

java compilation centos javac

java

Why doesn't the JVM cache JIT compiled code?

java caching jvm compilation jit

java

How do I compile and run a program in Java on my Mac?

java macos compilation

java

#ifdef #ifndef in Java

java compilation conditional conditional-compilation

java

Java compile speed vs Scala compile speed

java performance scala compilation

java

How can I compile a Java program in Eclipse without running it?

java eclipse compilation .class-file

java

Java: How can I compile an entire directory structure of code ?

java compilation javac directory-structure

java

Can I compile Java to native code?

java compilation native-code

java