Name: szC45993 Date: 03/13/97



The Java Virtual Machine, chapter 5 Constant Pool Resolution,
section 5.1.2 Current Class or Interface Loaded by Class Loader, claims:

"If the class file is successfully verified, the class or interface is then prepared (step 3b of $5.1.1) and initialized (step 4 of $5.1.1)."

and section 5.1.1 Current Class or Interface Not Loaded by Class Loader (3b), claims:

"If a class that is not declared abstract has an abstract method, class resolution throws an AbstractMethodError."

Meanwhile, undermentioned test gives the following result (jdk_1.0.2, jdk_1.1.1):
-------------------------------------------------------------------------
...
java.lang.InstantiationException: javasoft/sqe/tests/vm/constantpool/ClassInterf043/ClassInterf04301/Intrmdt
ERROR2: None AbstractMethodError is rised if the following situation is descovered: non-abstract class has abstract method!
ERROR1: Error must be rised on the preparing stage and before initializing stage!
...
-------------------------------------------------------------------------

So InstantiationException is rised instead of AbstractMethodError and, may be, this exception is rised on the initializing stage instead of the preparing stage as it's needed.

See also 4038335 for a class "not loaded by Class Loader", because of
the error reasons in both cases may be equal for a jvm release.

--------------------- ClassInterf04301.java
//File: @(#)ClassInterf04301.java 1.1 97/03/01
//Copyright 03/01/97 Sun Microsystems, Inc. All Rights Reserved

package javasoft.sqe.tests.vm.constantpool.ClassInterf043.ClassInterf04301;

import java.io.PrintStream;
import java.io.*;
import java.lang.*;
import java.util.*;
import java.awt.*;

class myClassLoader extends java.lang.ClassLoader {
  Hashtable cache = new Hashtable();

  private byte loadClassData(String name)[] {
String str_1,str_2,str1 = "",str2 = "/javasoft/sqe/tests/vm/constantpool/ClassInterf043/ClassInterf04301/";
File fl1;
FileInputStream fl3;
byte bt[];
int length;
int index = 0;
Properties prpr = System.getProperties();

str_1 = prpr.getProperty("java.class.path");
str2 = str2.concat(name);
str2 = str2.concat(".class");
str1 = str1.concat(str_1.substring(str_1.indexOf(":")+1));
try{
index = str_1.indexOf(":");
str_1 = str_1.substring(0,index);
} catch (Exception e) {ClassInterf04301.o.println(e);return null;};
str_2 = str_1.concat("/javasoft/sqe/tests/vm/constantpool/ClassInterf043/ClassInterf04301/Intrmdt.class");
str_1 = str_1.concat(str2);

while (true) {
fl1 = new File(str_2);
if (fl1.isFile()) {
break;
} else {
str_1 = "";
try{
index = str1.indexOf(":");
str_1 = str_1.concat(str1.substring(0,index));
} catch (Exception e) {ClassInterf04301.o.println(e);return null;};
str1 = str1.substring(str1.indexOf(":")+1);
str_2 = str_1.concat("/javasoft/sqe/tests/vm/constantpool/ClassInterf043/ClassInterf04301/Intrmdt.class");
str_1 = str_1.concat(str2);
}
}

try{
fl3 = new FileInputStream(str_1);
length = fl3.available();
bt = new byte[length];
fl3.read(bt);
fl3.close();


} catch (java.io.IOException e) {ClassInterf04301.o.println(e);return null;};

return bt;

  }

  public synchronized Class loadClass(String name, boolean resolve) {
Class c = (Class) cache.get(name);
String s1 = "Intrmdt";
String s3 = "ClassInterf04301";
String s4 = "Runnable";
String name1;


if (name.indexOf(s1) != -1) {
name1 = s1;
} else {
name1 = name;
}

if (name1.indexOf(".") != -1) {
if (c == null) {
try{
c = findSystemClass(name1);
}
catch (java.lang.ClassNotFoundException e) {
ClassInterf04301.o.println(e);
return null;
};
cache.put(name, c);
}
} else {
if (c == null) {
byte data[] = loadClassData(name1);
c = defineClass(data,0,data.length);
cache.put(name, c);
}
}
if (resolve) {
resolveClass(c);
}

return c;
  }

}

public class ClassInterf04301 {

  public static String loadedname = "";
  public static String strnm = "";
  public static PrintStream o;

  public static int run(String argv[], PrintStream out) {
myClassLoader mcl = new myClassLoader();
Class cl2 = null;
Runnable r;
int index1;
int index2;
int flg = 2;
String str = "";

o = out;

try{

out.println("********ClassInterf04301.run*********");

cl2 = mcl.loadClass("javasoft.sqe.tests.vm.constantpool.ClassInterf043.ClassInterf04301.Intrmdt", true);

r = (Runnable) cl2.newInstance();
r.run();

}
catch (java.lang.AbstractMethodError e) {
out.println(e);
index1 = loadedname.indexOf("Intrmdt INITIALIZING begin");
if (index1 != -1) {
out.println("ERROR3: AbstractMethodError must be rised on the preparing stage and before initializing stage!");
return 2;
}
return 0;
}
catch (java.lang.NoClassDefFoundError e) {
out.println(e);
}
catch (java.lang.IllegalAccessException e) {
out.println(e);
}
catch (java.lang.InstantiationException e) {
out.println(e);
};


out.println("ERROR2: None AbstractMethodError is rised if the following situation is descovered: non-abstract class has abstract method!");
index1 = loadedname.indexOf("Intrmdt INITIALIZING begin");
if (index1 != -1) {
out.println("ERROR1: Error must be rised on the preparing stage and before initializing stage!");
}
out.println("-----"+loadedname+"-----");
return 2;

  }

  public static void main(String argv[]) {
System.exit(run(argv, System.out) + 95/*STATUS_TEMP*/);
  }
}
--------------------- Intrmdt.jasm
package javasoft/sqe/tests/vm/constantpool/ClassInterf043/ClassInterf04301;

public synchronized class Intrmdt
implements java/lang/Runnable
{
// Compiled from Intrmdt.java
// Compiler version 3.45;

static Field str:"Ljava/lang/String;";

public Method run:"()V"
stack 2 locals 1
{
getstatic Field ClassInterf04301.o:"Ljava/io/PrintStream;";
ldc String "********Intrmdt.run*********";
invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/String;)V";
return;
}

public abstract Method run:"()V";
//!!!!!^^^^^^^^!!!!!!!!!!!!
//!!!!!^^^^^^^^!!!!!!!!!!!!
//!!!!!^^^^^^^^!!!!!!!!!!!!

public Method <init>:"()V"
stack 1 locals 1
{
aload_0;
invokespecial Method java/lang/Object.<init>:"()V";
return;
}

static Method <clinit>:"()V"
stack 2 locals 0
{
getstatic Field ClassInterf04301.o:"Ljava/io/PrintStream;";
ldc String " Intrmdt INITIALIZING begin";
invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/String;)V";
getstatic Field ClassInterf04301.loadedname:"Ljava/lang/String;";
ldc String "Intrmdt INITIALIZING begin";
invokevirtual Method java/lang/String.concat:"(Ljava/lang/String;)Ljava/lang/String;";
putstatic Field ClassInterf04301.loadedname:"Ljava/lang/String;";
ldc String "Class Intrmdt is linked";
putstatic Field str:"Ljava/lang/String;";
getstatic Field ClassInterf04301.loadedname:"Ljava/lang/String;";
ldc String "Intrmdt INITIALIZING end";
invokevirtual Method java/lang/String.concat:"(Ljava/lang/String;)Ljava/lang/String;";
putstatic Field ClassInterf04301.loadedname:"Ljava/lang/String;";
getstatic Field ClassInterf04301.loadedname:"Ljava/lang/String;";
getstatic Field str:"Ljava/lang/String;";
invokevirtual Method java/lang/String.concat:"(Ljava/lang/String;)Ljava/lang/String;";
putstatic Field ClassInterf04301.loadedname:"Ljava/lang/String;";
getstatic Field ClassInterf04301.o:"Ljava/io/PrintStream;";
ldc String " Intrmdt INITIALIZING end";
invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/String;)V";
return;
}

} // end Class Intrmdt
---------------------

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