Package com.github.javaparser.ast.stmt

Class TryStmt

java.lang.Object
com.github.javaparser.ast.Node
com.github.javaparser.ast.stmt.Statement
com.github.javaparser.ast.stmt.TryStmt
All Implemented Interfaces:
NodeWithRange<Node>, NodeWithTokenRange<Node>, Observable, Visitable, HasParentNode<Node>, Cloneable
public class TryStmt extends Statement

The try statement

Java 1.0-6

 try {
 // ...
 } catch (IOException e) {
 // ...
 } finally {
 // ...
 }
In this code, "// do things" is the content of the tryBlock, there is one catch clause that catches IOException e, and there is a finally block.

The catch and finally blocks are optional, but they should not be empty at the same time.

Java 7-8

 try (InputStream i = new FileInputStream("file")) {
 // ...
 } catch (IOException|NullPointerException e) {
 // ...
 } finally {
 // ...
 }
Java 7 introduced two things:
  • Resources can be specified after "try", but only variable declarations (VariableDeclarationExpr.)
  • A single catch can catch multiple exception types. This uses the IntersectionType.

Java 9+

 try (r) {
 // ...
 } catch (IOException|NullPointerException e) {
 // ...
 } finally {
 // ...
 }
Java 9 finishes resources: you can now refer to a resource that was declared somewhere else. The following types are allowed:
  • VariableDeclarationExpr: "X x = new X()" like in Java 7-8.
  • NameExpr: "a".
  • FieldAccessExpr: "x.y.z", "super.test" etc.
Author:
Julio Vilmar Gesser
See Also:
CatchClause, IntersectionType, FieldAccessExpr, NameExpr