8032819: Extra empty line between field declarations for the "-v -c" and "-v...

8032819: Extra empty line between field declarations for the "-v -c" and "-v -l" combination of options
Reviewed-by: ksrini

src/share/classes/com/sun/tools/javap/ClassWriter.java

@@ -385,6 +385,8 @@ public class ClassWriter extends BasicWriter {
 
         indent(+1);
 
+        boolean showBlank = false;
+
         if (options.showDescriptors)
             println("descriptor: " + getValue(f.descriptor));
 
@@ -394,12 +396,12 @@ public class ClassWriter extends BasicWriter {
         if (options.showAllAttrs) {
             for (Attribute attr: f.attributes)
                 attrWriter.write(f, attr, constant_pool);
-            println();
+            showBlank = true;
         }
 
         indent(-1);
 
-        if (options.showDisassembled || options.showLineAndLocalVariableTables)
+        if (showBlank || options.showDisassembled || options.showLineAndLocalVariableTables)
             println();
     }
 

test/tools/javap/T8032819.java

+/*
+ * Copyright (c) 2014, 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 8032819
+ * @summary Extra empty line between field declarations for the "-v -c" and "-v -l" combination of options
+ * @compile -g T8032819.java
+ * @run main T8032819
+ */
+
+import java.io.*;
+import java.util.*;
+
+public class T8032819 {
+    static class Fields {
+        int f1;
+        int f2;
+    }
+
+    public static void main(String... args) throws Exception {
+        new T8032819().run();
+    }
+
+    void run() throws Exception {
+        Class<?> clazz = Fields.class;
+        test(clazz);
+        test(clazz, "-c");
+        test(clazz, "-l");
+        test(clazz, "-l", "-c");
+        test(clazz, "-v");
+        test(clazz, "-v", "-c");
+        test(clazz, "-v", "-l");
+        test(clazz, "-v", "-l", "-c");
+
+        if (errors > 0)
+            throw new Exception(errors + " errors occurred");
+    }
+
+    static final String sep = System.getProperty("line.separator");
+    static final String doubleBlankLine = sep + sep + sep;
+
+    void test(Class<?> clazz, String... opts) throws Exception {
+        System.err.println("test " + Arrays.asList(opts));
+        List<String> args = new ArrayList<String>();
+        args.addAll(Arrays.asList(opts));
+        args.addAll(Arrays.asList("-classpath", System.getProperty("test.classes")));
+        args.add(clazz.getName());
+        StringWriter sw = new StringWriter();
+        PrintWriter pw = new PrintWriter(sw);
+        int rc = com.sun.tools.javap.Main.run(args.toArray(new String[args.size()]), pw);
+        pw.close();
+        String out = sw.toString();
+        if (rc != 0)
+            throw new Exception("javap failed unexpectedly: rc=" + rc);
+
+        int count = 0;
+        int i = out.indexOf(doubleBlankLine, 0);
+        while (i != -1) {
+            count++;
+            i = out.indexOf(doubleBlankLine, i + doubleBlankLine.length());
+        }
+
+        if (count > 0)
+            error(count + " double blank lines found");
+    }
+
+    void error(String msg) {
+        System.err.println("Error: " + msg);
+        errors++;
+    }
+
+    int errors = 0;
+}
+