javax.lang.model.type

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1. Get the type of a field

Field field = ...;
TypeMirror fieldType = field.getEnclosingElement().asType();

2. Get the type of a method parameter

Method method = ...;
TypeMirror parameterType = method.getParameters().get(0).asType();

3. Get the type of a method return value

Method method = ...;
TypeMirror returnType = method.getReturnType();

4. Get the type of a class

Class<?> clazz = ...;
TypeMirror classType = TypeMirror.get(clazz);

5. Get the type of an array

Class<?> clazz = ...;
TypeMirror arrayType = TypeMirror.get(clazz.getComponentType()).getArrayType();

6. Get the type of a wildcard

TypeMirror wildcardType = TypeMirror.getWildcardType(WildcardType.Kind.UNBOUNDED);

7. Get the type of a type variable

TypeVariable<?> typeVariable = ...;
TypeMirror typeVariableType = typeVariable.getLowerBound();

8. Get the type of a capture variable

CaptureVariable variable = ...;
TypeMirror captureVariableType = variable.getType();

9. Get the type of a generic method

Method genericMethod = ...;
TypeMirror genericMethodType = genericMethod.getGenericReturnType();

10. Get the type of a generic class

Class<?> genericClass = ...;
TypeMirror genericClassType = TypeMirror.get(genericClass);

11. Get the type of a generic interface

Interface genericInterface = ...;
TypeMirror genericInterfaceType = TypeMirror.get(genericInterface);

12. Get the type of a parameterized type

Class<?> parameterizedClass = ...;
TypeMirror parameterizedType = TypeMirror.get(parameterizedClass);

13. Get the type of a raw type

Class<?> rawType = ...;
TypeMirror rawType = TypeMirror.get(rawType);

14. Get the type of an intersection type

IntersectionType intersectionType = ...;
TypeMirror intersectionTypeType = intersectionType.getConstituents().get(0);

15. Get the type of an union type

UnionType unionType = ...;
TypeMirror unionTypeType = unionType.getConstituents().get(0);

16. Get the type of a nested type

Class<?> nestedClass = ...;
TypeMirror nestedType = TypeMirror.get(nestedClass);

17. Get the type of an annotation

Annotation annotation = ...;
TypeMirror annotationType = annotation.getAnnotationType();

18. Get the type of an enum constant

EnumConstant enumConstant = ...;
TypeMirror enumConstantType = enumConstant.getType();

19. Get the type of a package

Package pkg = ...;
TypeMirror packageType = TypeMirror.get(pkg);

20. Get the type of a type parameter

TypeParameter typeParameter = ...;
TypeMirror typeParameterType = typeParameter.getBounds().get(0);

21. Get the type of a method receiver

Method method = ...;
TypeMirror receiverType = method.getReceiverParameter().getType();

22. Get the type of a method exception

Method method = ...;
TypeMirror exceptionType = method.getExceptionTypes().get(0);

23. Get the type of a method type parameter

Method method = ...;
TypeMirror typeParameterType = method.getTypeParameters().get(0).asType();

24. Get the type of a constructor argument

Constructor constructor = ...;
TypeMirror parameterType = constructor.getParameters().get(0).asType();

25. Get the type of a constructor exception

Constructor constructor = ...;
TypeMirror exceptionType = constructor.getExceptionTypes().get(0);

26. Get the type of a constructor type parameter

Constructor constructor = ...;
TypeMirror typeParameterType = constructor.getTypeParameters().get(0).asType();

27. Get the type of a type cast

CastTree castTree = ...;
TypeMirror castType = castTree.getType();

28. Get the type of an instanceof expression

InstanceOfTree instanceofTree = ...;
TypeMirror instanceofType = instanceofTree.getType();

29. Get the type of a new array expression

NewArrayTree newArrayTree = ...;
TypeMirror arrayType = newArrayTree.getType();

30. Get the type of a new class expression

NewClassTree newClassTree = ...;
TypeMirror newClassType = newClassTree.getType();

31. Get the type of a parenthesized expression

ParenthesizedTree parenthesizedTree = ...;
TypeMirror parenthesizedType = parenthesizedTree.getType();

32. Get the type of a switch statement

SwitchTree switchTree = ...;
TypeMirror switchType = switchTree.getExpression().getType();

33. Get the type of a synchronized statement

SynchronizedTree synchronizedTree = ...;
TypeMirror synchronizedType = synchronizedTree.getExpression().getType();

34. Get the type of a try statement

TryTree tryTree = ...;
TypeMirror tryType = tryTree.getExpression().getType();

35. Get the type of a throw statement

ThrowTree throwTree = ...;
TypeMirror throwType = throwTree.getExpression().getType();

36. Get the type of a while statement

WhileLoopTree whileLoopTree = ...;
TypeMirror whileType = whileLoopTree.getCondition().getType();

37. Get the type of a do-while statement

DoWhileLoopTree doWhileLoopTree = ...;
TypeMirror doWhileType = doWhileLoopTree.getCondition().getType();

38. Get the type of a for-each statement

EnhancedForTree enhancedForTree = ...;
TypeMirror forEachType = enhancedForTree.getVariable().getType();

39. Get the type of a for statement

ForLoopTree forLoopTree = ...;
TypeMirror forType = forLoopTree.getCondition().getType();

40. Get the type of a break statement

BreakTree breakTree = ...;
TypeMirror breakType = breakTree.getEnclosingStatement().getType();

41. Get the type of a continue statement

ContinueTree continueTree = ...;
TypeMirror continueType = continueTree.getEnclosingStatement().getType();

42. Get the type of a return statement

ReturnTree returnTree = ...;
TypeMirror returnType = returnTree.getExpression().getType();

43. Get the type of a variable

VariableTree variableTree = ...;
TypeMirror variableType = variableTree.getType();

44. Get the type of an expression statement

ExpressionStatementTree expressionStatementTree = ...;
TypeMirror expressionType = expressionStatementTree.getExpression().getType();

45. Get the type of a block statement

BlockTree blockTree = ...;
TypeMirror blockType = blockTree.getStatements().get(0).getType();

46. Get the type of an if statement

IfTree ifTree = ...;
TypeMirror ifType = ifTree.getCondition().getType();

47. Get the type of an else if statement

IfTree elseIfTree = ...;
TypeMirror elseIfType = elseIfTree.getCondition().getType();

48. Get the type of an else statement

ElseTree elseTree = ...;
TypeMirror elseType = elseTree.getStatements().get(0).getType();

49. Get the type of a switch-case statement

CaseTree caseTree = ...;
TypeMirror caseType = caseTree.getExpression().getType();

50. Get the type of a switch-default statement

DefaultTree defaultTree = ...;
TypeMirror defaultType = defaultTree.getStatements().get(0).getType();