Scope

• Scope refers to the lifetime of a variable.
• There are four basic scopes:
• Static variables live basically as long as their class lives.
• Instance variables live as long as their object lives.
• Local variables live as long as their method is on the stack; however, if their method invokes another method, they are temporarily unavailable.
• Block variables (e.g., in a for or an if) live until the block completes.