### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core.tests.model
Index: src/org/eclipse/jdt/core/tests/model/WorkingCopyOwnerTests.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/WorkingCopyOwnerTests.java,v
retrieving revision 1.55
diff -u -r1.55 WorkingCopyOwnerTests.java
--- src/org/eclipse/jdt/core/tests/model/WorkingCopyOwnerTests.java	29 Mar 2006 04:03:07 -0000	1.55
+++ src/org/eclipse/jdt/core/tests/model/WorkingCopyOwnerTests.java	28 Apr 2006 15:45:54 -0000
@@ -984,6 +984,19 @@
 		this.workingCopy.commitWorkingCopy(true, null);
 		assertFalse("Should not have unsaved changes", this.workingCopy.hasUnsavedChanges());
 	}
+	
+	/*
+	 * Ensures that a Java project named " " doesn't exist if a working copy with no resource is created.
+	 * (regression test for bug 138999 Regression: Fix for 128258 introduces regression in JavaProject.exists())
+	 */
+	public void testNewWorkingCopy09() throws CoreException {
+		this.workingCopy = newExternalWorkingCopy(
+			"X.java",
+			"public class X {\n" +
+			"}"
+		);
+		assertFalse("Java project named \" \" should not exist", getJavaProject(ExternalJavaProject.EXTERNAL_PROJECT_NAME).exists());
+	}
 
 	/**
 	 * Ensures that creating a DOM AST and computing the bindings takes the owner's working copies into account.
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/internal/core/JavaProject.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaProject.java,v
retrieving revision 1.369
diff -u -r1.369 JavaProject.java
--- model/org/eclipse/jdt/internal/core/JavaProject.java	6 Apr 2006 19:15:52 -0000	1.369
+++ model/org/eclipse/jdt/internal/core/JavaProject.java	28 Apr 2006 15:45:57 -0000
@@ -1009,7 +1009,12 @@
 	}
 
 	public boolean exists() {
-		return hasJavaNature(this.project);
+		try {
+			return this.project.hasNature(JavaCore.NATURE_ID);
+		} catch (CoreException e) {
+			// project does not exist or is not open
+		}
+		return false;
 	}	
 
 	/**