6715757: javap does not print "extends java.lang.Object"

Reviewed-by: ksrini

langtools/src/share/classes/com/sun/tools/classfile/Type.java

@@ -36,10 +36,6 @@ import java.util.List;
 public class Type {
     protected Type() { }
 
-    public boolean isObject() {
-        return false;
-    }
-
     protected static void append(StringBuilder sb, String prefix, List<? extends Type> types, String suffix) {
         sb.append(prefix);
         String sep = "";
@@ -66,11 +62,6 @@ public class Type {
             return name;
         }
 
-        @Override
-        public boolean isObject() {
-            return name.equals("java.lang.Object");
-        }
-
         public final String name;
     }
 
@@ -129,7 +120,7 @@ public class Type {
         public String toString() {
             StringBuilder sb = new StringBuilder();
             appendIfNotEmpty(sb, "<", typeArgTypes, ">");
-            if (superclassType != null && !superclassType.isObject()) {
+            if (superclassType != null) {
                 sb.append(" extends ");
                 sb.append(superclassType);
             }
@@ -188,7 +179,7 @@ public class Type {
             StringBuilder sb = new StringBuilder();
             sb.append(name);
             String sep = " extends ";
-            if (classBound != null && !classBound.isObject()) {
+            if (classBound != null) {
                 sb.append(sep);
                 sb.append(classBound);
                 sep = " & ";

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

@@ -104,14 +104,10 @@ public class ClassWriter extends BasicWriter {
         Signature_attribute sigAttr = getSignature(cf.attributes);
         if (sigAttr == null) {
             // use info from class file header
-            if (classFile.isClass()) {
-                if (classFile.super_class != 0 ) {
-                    String sn = getJavaSuperclassName(cf);
-                    if (!sn.equals("java.lang.Object") || options.compat) { // BUG XXXXXXXX
-                        print(" extends ");
-                        print(sn);
-                    }
-                }
+            if (classFile.isClass() && classFile.super_class != 0 ) {
+                String sn = getJavaSuperclassName(cf);
+                print(" extends ");
+                print(sn);
             }
             for (int i = 0; i < classFile.interfaces.length; i++) {
                 print(i == 0 ? (classFile.isClass() ? " implements " : " extends ") : ",");
@@ -124,7 +120,7 @@ public class ClassWriter extends BasicWriter {
                 // FieldType and a ClassSignatureType that only contains a superclass type.
                 if (t instanceof Type.ClassSigType)
                     print(t);
-                else if (!t.isObject()) {
+                else {
                     print(" extends ");
                     print(t);
                 }

langtools/test/tools/javap/4870651/T4870651.java

@@ -23,8 +23,9 @@
 
 /*
  * @test
- * @bug 4870651
- * @summary javap should recognize generics, varargs, enum
+ * @bug 4870651 6715757
+ * @summary javap should recognize generics, varargs, enum;
+ *          javap prints "extends java.lang.Object"
  * @build T4870651 Test
  * @run main T4870651
  */
@@ -38,7 +39,9 @@ public class T4870651 {
 
     public void run() throws IOException {
         verify("Test",
-               "class Test<T, E extends java.lang.Exception & java.lang.Comparable<T>, U extends java.lang.Comparable>",
+               "class Test<T extends java.lang.Object, " +
+                   "E extends java.lang.Exception & java.lang.Comparable<T>, " +
+                   "U extends java.lang.Comparable>",
                "v1(java.lang.String...)");
 
         verify("Test$Enum",

langtools/test/tools/javap/T4880663.java

@@ -23,8 +23,9 @@
 
 /*
  * @test
- * @bug 4880663
+ * @bug 4880663 6715757
  * @summary javap could output whitespace between class name and opening brace
+ *          javap prints "extends java.lang.Object"
  */
 
 
@@ -38,7 +39,7 @@ public class T4880663 {
     public void run() throws IOException {
         File javaFile = writeTestFile();
         File classFile = compileTestFile(javaFile);
-        verify(classFile, "class Test {");
+        verify(classFile, "class Test extends java.lang.Object {");
 
         if (errors > 0)
             throw new Error(errors + " found.");