// default (no-arg) constructor:
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, superClass, "<init>", "()V");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
// then single-arg constructor
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "("+stdValueInstDesc+")V", null, null);
mv.visitCode();