Class loading, object creation

src/classfile.rs

@@ -162,7 +162,18 @@ impl JavaClassFile {
         )
     }
 
-    pub fn get_classname(&self) -> Result<String, Error> {
+    pub fn has_super_class(&self) -> bool {
+        return self.super_class != 0;
+    }
+
+    pub fn get_super_class_name(&self) -> Result<&String, Error> {
+        let super_class_entry = self.pool_class_entry(self.super_class)?;
+        let super_name_entry  = self.pool_utf8_entry(super_class_entry.name_index)?;
+
+        return Ok(&super_name_entry.utf8);
+    }
+
+    pub fn get_classname(&self) -> Result<&String, Error> {
         let class_info_entry = self.pool_entry(self.this_class)?;
 
         let class_info_entry = match class_info_entry {
@@ -176,7 +187,7 @@ impl JavaClassFile {
             _ => return Err(Error::BadFileError(format!("Invalid class_info.name_index from this_class, expected index to Utf8 but found {:?}", name_entry)))
         };
 
-        return Ok(name_entry.utf8.clone());
+        return Ok(&name_entry.utf8);
     }