diff --git a/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/dom/ASTTest.java b/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/dom/ASTTest.java
index 5bb5733..8970e8f 100644
--- a/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/dom/ASTTest.java
+++ b/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/dom/ASTTest.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2011 IBM Corporation and others.
+ * Copyright (c) 2000, 2012 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -5265,6 +5265,16 @@ public class ASTTest extends org.eclipse.jdt.core.tests.junit.extension.TestCase
 	 * @deprecated (Uses getLeadingComment() which is deprecated)
 	 */
 	public void testTryStatement() {
+		if (this.ast.apiLevel() <= AST.JLS3) {
+			// node type introduced in 4.0 API
+			try {
+				final TryStatement x = this.ast.newTryStatement();
+				x.resources();
+				assertTrue("should not be reached if jls level <= JLS3", false);
+			} catch (UnsupportedOperationException e) {
+				// pass
+			}
+		}
 		long previousCount = this.ast.modificationCount();
 		final TryStatement x = this.ast.newTryStatement();
 		assertTrue(this.ast.modificationCount() > previousCount);
diff --git a/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/TryStatement.java b/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/TryStatement.java
index bb4b322..79575e1 100644
--- a/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/TryStatement.java
+++ b/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/TryStatement.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2011 IBM Corporation and others.
+ * Copyright (c) 2000, 2012 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -352,7 +352,7 @@ public class TryStatement extends Statement {
 	 */
 	public List resources() {
 		// more efficient than just calling unsupportedIn2_3() to check
-		if (this.resources != null) {
+		if (this.resources == null) {
 			unsupportedIn2_3();
 		}
 		return this.resources;
diff --git a/org.eclipse.jdt.core/dom/org/eclipse/jdt/internal/core/dom/NaiveASTFlattener.java b/org.eclipse.jdt.core/dom/org/eclipse/jdt/internal/core/dom/NaiveASTFlattener.java
index 9394af1..b53e418 100644
--- a/org.eclipse.jdt.core/dom/org/eclipse/jdt/internal/core/dom/NaiveASTFlattener.java
+++ b/org.eclipse.jdt.core/dom/org/eclipse/jdt/internal/core/dom/NaiveASTFlattener.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2011 IBM Corporation and others.
+ * Copyright (c) 2000, 2012 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -1528,9 +1528,9 @@ public class NaiveASTFlattener extends ASTVisitor {
 	public boolean visit(TryStatement node) {
 		printIndent();
 		this.buffer.append("try ");//$NON-NLS-1$
-		List resources = node.resources();
 		if (node.getAST().apiLevel() >= AST.JLS4) {
-			if (!node.resources().isEmpty()) {
+			List resources = node.resources();
+			if (!resources.isEmpty()) {
 				this.buffer.append('(');
 				for (Iterator it = resources.iterator(); it.hasNext(); ) {
 					VariableDeclarationExpression variable = (VariableDeclarationExpression) it.next();