8367702: PrintJob.getGraphics() should return null after PrintJob.end

Reviewed-by: azvegint

Author: prrace

src/java.desktop/share/classes/sun/print/PrintJob2D.java

@@ -79,7 +79,12 @@ public Graphics getGraphics() {
          * needs to implement PrintGraphics, so we wrap
          * the Graphics2D instance.
          */
-        return new ProxyPrintGraphics(printJobDelegate.getGraphics(), this);
+        Graphics g = printJobDelegate.getGraphics();
+        if (g == null) { // PrintJob.end() has been called.
+            return null;
+        } else {
+            return new ProxyPrintGraphics(g, this);
+        }
     }
 
     /**

test/jdk/java/awt/PrintJob/GetGraphicsTest.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2004, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+  @test
+  @bug 50510568367702
+  @key headful printer
+  @summary  PrintJob.getGraphics() should return null after PrintJob.end() is called.
+  @run main GetGraphicsTest
+*/
+
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.JobAttributes;
+import java.awt.PageAttributes;
+import java.awt.PrintJob;
+import java.awt.Toolkit;
+
+public class GetGraphicsTest {
+
+    public static void main(String[] args) {
+
+        JobAttributes ja = new JobAttributes();
+        ja.setDialog(JobAttributes.DialogType.NONE);
+        PageAttributes pa = new PageAttributes();
+        pa.setOrigin( PageAttributes.OriginType.PRINTABLE);
+
+        Toolkit tk = Toolkit.getDefaultToolkit();
+        PrintJob pjob = tk.getPrintJob(new Frame(),"Printing Test", ja,pa);
+        if (pjob != null) {
+            pjob.end();
+            Graphics pg = pjob.getGraphics();
+            if (pg == null) {
+                System.out.println("Graphics is null, TEST PASSES");
+            }
+            else {
+               throw new RuntimeException("Graphics is NOT null, TEST FAILED");
+            }
+        }
+    }
+}