Below code snippet is expected to generate ClassFormatError on class loading. Instead we observe java.lang.NoClassDefFoundError.

Parameter to method 'func' here is a reference to empty class name ie, "L;". As per JVMS: "4.2.1 Binary Class and Interface Names", individual identifiers of the binary class name should be minimum 1 unicode character. Hence a class loading error is more apt for this scenario.

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super public class method_param
        version 56:0
{


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

public static Method main:"([Ljava/lang/String;)V"
        stack 2 locals 1
{
                getstatic Field java/lang/System.out:"Ljava/io/PrintStream;";
                ldc String "Testing method param types";
                invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/String;)V";
                return;
}

public static Method func:"(L;)V"
        stack 0 locals 1
{
                return;
}

} // end Class method_param
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