ensime

特点：

• Highlight errors and warnings in your code buffers.
• Inspect the type of any expression.
• Browse packages
• Completion for variables, methods, constructors, etc.
• Incrementally search through classpath symbols
• Find all references to a symbol
• Jump to symbol definitions.
• Semantic Highlighting
• Automated Refactorings (rename, organize imports, extract method)
• Source Formatting
• AST-based selection
• Supports sbt7,10,11
• Supports Maven,Ivy build descriptions
• Embedded sbt shell
• REPL
• Debug support