# Interface UnaryTree

All Superinterfaces:
  `ExpressionTree, Tree`

public interface UnaryTree extends ExpressionTree
A tree node for postfix and unary expressions. Use `getKind` to determine the kind of operator. For example:

      operator expression

      expression operator

See Java Language Specification:
  15.14 Postfix Expressions
  15.15 Unary Operators
Since:
  1.6

- ## Nested Class Summary

  ### Nested classes/interfaces declared in interface Tree

  `Tree.Kind`
  Modifier and Type
  Interface
  Description
  `static enum`
  `Tree.Kind`
  Enumerates all kinds of trees.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `ExpressionTree`
  `getExpression()`
  Returns the expression that is the operand of the unary operator.

  ### Methods declared in interface Tree

  `accept, getKind`
  Modifier and Type
  Method
  Description
  `<R,D> R`
  `accept(TreeVisitor<R,D> visitor, D data)`
  Accept method used to implement the visitor pattern.
  `Tree.Kind`
  `getKind()`
  Returns the kind of this tree.

- ## Method Details

  - ### getExpression

    ExpressionTree getExpression()
    Returns the expression that is the operand of the unary operator.
    Returns:
      the expression