PsiTypeParameter (@NotNull String name, PsiClassType @NotNull [] superTypes) { StringBuilder builder = new StringBuilder(); builder.append("public <").append(name); if (superTypes.length > 1 || superTypes.length == 1 && !superTypes[0].equalsToText(CommonClassNames.JAVA_LANG_OBJECT)) { builder.append(" extends "); for (PsiClassType type : superTypes) { if (!type.equalsToText(CommonClassNames.JAVA_LANG_OBJECT)) { builder.append(type.getCanonicalText(true)).append('&'); } } builder.delete(builder.length() - 1, builder.length()); } builder.append("> void foo(){}"); try { return createMethodFromText(builder.toString(), null).getTypeParameters()[0]; } catch (RuntimeException e) { throw new IncorrectOperationException("type parameter text: " + builder, (Throwable)e); } }